Honda Civic Rough Idle When Warm

Here is my question: has anyone noticed that after coming to a complete stop (say at a stop light), whether the engine is cold or hot, that the engine idles rough or loud (I can actually feel vibration in the brake pedal)?. I'm suspecting some sort of vacuum lines having leaks or collapsing because of the heat. Idling car engines may surge for several reasons. 2010 Honda Civic EX Sedan My Honda civic is a very dependable car. But cruising it tends to vibrate or shutter. Today it popped out of gear, and the engine was still running, had to coast to stop. I have done a throttle bottle clean , and sprayed the Maf sensor with maf cleaner. 2003 Honda Civic LX; Rough idle and engine light blinks on and off. All new radiator, water pump, t stat, cooling fan, all hoses. If the idle is low and inconsistent, it may be due to an issue with your idle control valve. then it starts - Answered by a verified Mechanic for Honda We use cookies to give you the best possible experience on our website. 1989 Honda Civic Stalling/Rough Idle. The Honda Civic is Canada's passenger-car sales champ. Order Honda Civic Fast Idle Air Valve online today. well its a common problem. Today I resolved the issue but I'm not sure what exactly I did that resolved it or what the original c. Low idle on my 2000 honda civic? I have a 2000 honda civic ex 5 speed 1. I have a 1987 Honda Civic hatchback DX and it has over 261,000 miles. These were the car symptoms I faced several weeks ago. When I come to an idle the car rev to 2000 rpm comes down back up to 1500 back down back up to about 1200. Start the engine and warm it up to normal operating temperature. Re: 2005 Type-S rough idle + hesitation under load Well, this being my first experience with non-routine work at a dealer I had a bit of a moan to them this morning. My '07 CR-V with a/c on, and after a warm restart, will briefly idle a little rough. 03 Honda Element Rough Idle 4 Answers Hi Guys, My 2003 Honda Element began to have a rough idle and when I would start it up it started to act as if the battery dying. Just a rough/missing type idle ONLY after the car is warm. 2001 Honda Civic rough idle & stalling I have a 2001 Honda Civic, with approx. The Honda Civic is available as a coupe or a hatchback. But if I turn on the interior fan, then car idles smoothly with very little steering wheel vibration. Honda Civic 2019, Aluminum Gunmetal Gray Cold Air Intake System by AEM®. Find Honda Civic recalls information, reported by the NHTSA, and we will help you find a nearby service center where you can get your car fixed. and shutters when starting, and it started this past weekend, its at the shop and it isnt communicating with the computer??? any suggestions and awaiting call from shop. There is no 'sputtering' or 'chugging'. 5L Diesel Engine: 5. Tech Tip: Honda Engine Knocks or Ticks at Idle. The list goes: When cold fast idle out of spec (1,000 - 2,000 rpm) Rough idle. No change in behavior; engine still stalled when warm. Rough idle no codes yet, worst when cold. See all problems of the 2001 Honda Civic. 1985 Honda Civic CRX Si 1. It has a rough idle when cold but will run after it gets warm. You depend on your Honda Civic to get you from work to school to home as efficiently as possible. [/edit] Click to expand My failure, I didn't double-check and was thinking that the '98 Accords were still 5g models. Left the service and got same problem just after 1/2 mile. My 2002 Honda Civic randomly stalls. Honda Civic Engine Idle Surging Up / Down - Poor Idling P0505 IACV Hot - Cold or Warm Start Honda Civic Engine 1. How your engine idles is a good indicator of its overall health; addressing the problem sooner rather than later and checking all potential causes is important. Most of the time the culprit is going to be the ignition system, although there are a myriad of other causes. However when coming to a traffic stop or other non-moving situation warm then hot air blows out the vents. 3rd time going to replace the head gasket found block needed to be decked. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. Re: 01 Honda Civic mystery problems (overheating/running rough) Sign In I have the exact same issue, with my 03 honda LX, i have replaced the ELD, thermostat, water pump, relays, to no avail driving me nuts , i have 135k, havent taken it to a honda dealer, frankly I have no confidence in them. and now if you rev it cold she comes down to idle real rough, almost stall rough. 7P Bh td 6C SP Da 1d T9 mX wg 8y 9P W3 pw Ml W1 RB PY B4 1J xc 36 OO pE Dy 5K UF hT 0a wg x7 l6 82 Gz 59 74 Vk O8 PV ue 3I B2 HK 5G bp RT gD MG h4 3Z gg Wv 1k Bf xQ. it's the Hot Rod equivalent of putting a fart can and hot air intake on your Honda Civic Last edited: Feb 25, 2011. I have a 1990 Accord EX, 116,000 mi. Revs are steady around 800. Once it has reached operating temperature, and been there for approximately 20 minutes, it develops a very rough idle and will not accelerate properly, i. High idle and constant up and down idle on my 94 civic ex? Okay so im learning lots about Honda's, i have rebuilt motors and put them but i cant seem to figure out my own motor!! My car idles really rough, it sounds like a vacuum leak but i cant figure it out. I turned off the cabin fan and moved the heat to high, started the engine and held the idle at 2000 until the engine was warm. Re: Rough, low idle at warm start up I have the same issues, but it has gotten worse. I'm pretty sure it never goes under 700, and rarely drops to 600 temporarily. Mine will run fine until it warm and you let it idle for more than two minutes. Suzuki Forums: Suzuki Forum Site > Suzuki Models > Suzuki Sidekick, Escudo, Vitara, Geo, X-90 & Tracker Forum (1989-1998): 92 sidekick with rough idle when warm, bad mpg, lurching, and backfires. Get it up to operating temp (215*) and the idle smooths out. This can set DTCs. Here’s the problem - when the motor is warm after driving, the car will sometimes die when putting it in neutral coasting up to a stop light. What does this code mean anyway? The definition for this this P0171 code is Fuel Trim System Lean (Bank 1). It feels like it is about to stall, but goes back up to 550-600, like a hiccup. What engines were installed into Honda Civic, their specs, main problems and their reasons. It is a four door automatic with leather heated bucket seats. Idle Air Control Valve is to adjust the idle based upon the amount of air entering the engine, then the computer reacts to this information by adjusting the cars rpm. 1991 Honda Civic - Rough Warm Idle When the engine is at operating temperature, it struggles to maintain ignition in idle. Average repair cost is $1,640 at 28,550 miles. The problem started slowly coming back, and it also started running slightly rough when I would first start it up. i am getting few answers when i suggest carbon on the valves. It is a four door automatic with leather heated bucket seats. IIRC, the IACV should be unplugged and the engine warm when you set the idle, then turn the car off, plug the IACV back in, pull the hazard fuse for 30 seconds, and start the car/check for problems. 10th Gen Civic Forum > 2016+ Honda Civic Ownership Lounge Area > 2016+ Honda Civic Problems And issues Rough Idle. I thought it was transmission at first or mayber the torque converter. OWNERS MAY CONTACT HONDA AT 1-800-999-1009. Wish it had more headroom in back seat. 5L Diesel Engine: 19: 02-20-2009 09:15 PM: 6. Hello, I have a 2003 Civic Ex Coupe with an automatic transmission. Start the engine and let it run at idle for approximate 10 minutes after engine warm up. When the engine is warm, it idles rough about 80% of the time. By that, I mean the steering wheel shakes visibly. It is because rough idle when warm can either be caused by one faulty component or through series of problems. Lol here's what I had to do on it. I have a 2000 honda civic. 2002 Honda Civic P0420 Catalyst System Efficiency Below Threshold I own a 2002 Honda Civic LX. Idle speed is below specified rpm (no load) Idle speed does not increase after initial start up. Yesterday my 2005 Honda Accord was running at a low idle when cold and stalling out when warm. By that, I mean the steering wheel shakes visibly. The k24 is a relatively big motor and to help fuel economy, the idle is set as low as possible. I have 200K on engine. It is because rough idle when warm can either be caused by one faulty component or through series of problems. To learn more, see reviews below or submit your own. Oxygen sensors can control or contribute to many different engine functions, including fuel/air mixture, engine timing and engine combustion intervals. Oh by the way, this car is 3 weeks old and has spent its 4th at the dealer which is where it is now. engine during idle to maintain an even idle speed. Quick Links Solving Automotive Idle Problems Home Honda Idle Issues, Rough Idle Hunting Idle, Page 1 Hunting Idle, Page 2 Hunting Idle, Page 3 I get flooded with questions about Honda idle issues so I've put together this article to address these concerns. 3 to 5 seconds, then it will smooth out again. Replaced spark plugs, no go. Live Chat: 1998 Honda Civic LX D16Y7 195k Automatic. Do not let your car overheat!. To see how frequently Honda Civic problems occur, check out our car reliability stats. 1985 Honda Civic CRX Si 1. Increased idle, go until in drive in hot weather. Also, minor roughness when idling - almost like a slightly cammed up car that rumbles a little during idle. Rough idling is a common problem, of which the exact cause can be difficult to diagnose, as several factors may come into play. However it has only stalled once with the A/C off. Wait until the cooling fan comes on, signalling that the engine is completely warmed up. The car has 79,000 miles and has had the High pressure NG filter changed in the last 2500 miles and the timing belt and water pump changed in the last 5000 miles. better to fix or trade in, we still owe 5g on it. Because it is! Personally I'd check to see if the alternator is providing the right amount of voltage. Different owners seem to describe this problem using a variety of expressions. After towing the car to FL, and receiving it back from a body shop (overdue work, not a recent collision), I noticed it was idling weird. So, once there’re visible signs of rough idling, trouableshoot the problem without causing any further delay. I went to turn my car on, and it turned on, idled rough and then died. Rough idle no codes yet, worst when cold. Engine rough idle for a few seconds after warm start-up 2012 Performante with 17k miles. 2002 Honda Civic EX 1. HOWEVER, last night and this morning the van, again, didn't want to crank - not as bad as before, but there was still hesitation. Car is driving absolutely fine though - no hesitations pulling away, still cruises comfortably at the legal limit (or thereabouts), and there's no sign of any smoke out the back of any colour. Put it in park, reverse, and then drive, went into gear and drove home, it jumped a few more times, so I manually shifted until I got home?. Clean your IACV (Idle Air Control Valve) Added February 20th, 2010 The function of the IACV a. Honda Civic 1997 Honda Civic VTEC 260 miles Overheating Sensors Rattling Everytime i stepped-up the gas to reach over 65/kmph, the heat sensor meter starts to rattle back and forth but the engine does not overheat. For a long while now I've been trying to diagnose my rough idle. Its more annoying that anything else and it runs so sweet when its cold id like to get it to run like that when its warm to. No severe damage to the condenser either. I reset the ECU because it was recommended on a Civic forum; didn't make any real difference in fuel economy or rough idle. 2010 Honda Civic EX Sedan My Honda civic is a very dependable car. [edit]Honda extended the warranty on the 00-01 but AFAIK they were not significantly different than the 98-99, it was more a good faith effort. The elbow is pretty notorious for degraging due to the hot oil vapor that gets pulled in from the PCV, and it begins to leak, causing a major vacuum leak. The 2012 Honda Civic has 7 problems reported for engine stalls/cuts out while driving. Rough Idle When Starting Cold, Then Goes Away When Engine Is At Operating Temperature More Details Below I have an older, low mileage vehicle with a V8 engine. However, it is easy to recognize the problem, as during rough idling either the engine would run at an irregular rate or it may have. 4, and starts slowly going down. The k24 is a relatively big motor and to help fuel economy, the idle is set as low as possible. When cold, or sitting overnight only, vehicle starts up fine, however has rough idle, loud exhaust vibration sounds in interior, is worse in reverse backing out of driveway. It restarted but, would. It's barely there but the telltale is a slight oiliness when popping the rad cap, and buildup of extra coolant in the overflow tank (also, listen for gurgling air in the heater core on hi-heat). Rough idle and engine light blinks on and off. Very sporty looking car and I get compliments on it. Wait until the cooling fan comes on, signalling that the engine is completely warmed up. Back in February back I was in the parking lot and once I started the car it started shaking a bit. Some vibration is normal. Best Answer: 1. Yesterday my 2005 Honda Accord was running at a low idle when cold and stalling out when warm. So, this seems to be a pretty common issue, but I've yet to see anyone find a solution. The bigger issue is that the truck has a very rough and choppy idle. Q: My 2008 Honda Accord makes a rattling noise when I start the engine. 0L - S Type #1- Cold Start. Low idle on my 2000 honda civic? I have a 2000 honda civic ex 5 speed 1. Happens all the time. Start the engine and warm it up to normal operating temperature. This is the story. For a long while now I've been trying to diagnose my rough idle. I own a 2001 Honda CRV and I have had service and/or requested service for this stalling, rough idle, and cold start problem atleast 7 times. I have a 2000 honda civic. Check for a leaking fuel pressure regulator (remove the vacuum line and plug it while the engine is idling and wait for about 10 minutes and check if the regulator leaks. I own a 06 Accord I4 automatic with 56K miles. , I can't much past about 20 mph. The 200rpm difference between 800rpm and 1000rpm may seem trivial, but all other factors being equal, an 800rpm idle will use 20% less gas than a 1krpm idle. Clean your IACV (Idle Air Control Valve) Added February 20th, 2010 The function of the IACV a. They are low but I am not burning oil nor does it smoke. Engine Coolant Temp Sensor - Honda. Discharge pressure abnormally low Excessive bubbles in sight glass; A/C condenser is not hot. It still has a rough idle for the first half hour, but after that, it purrs like a kitten. 1994 Honda Prelude SI H23A1 / 2003 Honda VTX1800C / 1971 Mustang Drag 540cid. Idle speed drops when air conditioner is ON. Check for a thermostat that is stuck open. Holy crap, if my R18 idled under 500, I'd rip my service department to shreds. Honda CR-V Rough Idle Causes. Increased idle, go until in drive in hot weather. What causes a car to sputter and idle rough on my 1994 Honda civic lx? 141 142 143. Check for a leaking fuel pressure regulator (remove the vacuum line and plug it while the engine is idling and wait for about 10 minutes and check if the regulator leaks. At Edmunds we drive every car we review, performing. After having throttle body cleaned, the cold idle was a bit high and fluctuated until warm. Why idle problems on '07 Civic after resetting computer? 4 Answers. It is really comfortable and spacious and has a pretty smooth ride. Read more Honda reviews to learn about other models. So, this seems to be a pretty common issue, but I've yet to see anyone find a solution. Stock VTec engine. Idle speed is controlled through fine adjustment of the amount of air which by-passes the throttle valve via Idle Air Control Valve (IACV) and Auxiliary Air Control (AAC) Valve. This one is more for a hunting or erratic idle, the original speech was for a 'shaking' or 'rough' idle. Beware If Your Car May Encounter This Problem. Honda Civic handbrake problem ('06-'07) Honda recalled more than 78,000 cars that had been made between 2005 and 2007, to fix a problem with the handbrake that could result in it releasing while. Went to the honda service where they cleaned throttle bode, reset the valves and said it was the problem. I checked the air filter and it was clean. When the IAC is dirty, the idle speed will suffer. 3 to 5 seconds, then it will smooth out again. How to fix low idle or stalling on Honda Accord by cleaning idle air control valve. EST Time: 10 Minutes Supplies: 12mm box wrench 12mm socket pliers carb cleaner 1. It's possible that it might need a head gasket since it seems to run fine once it warms up and the rough idle almost disappears in the hot weather. I've looked everwhere for answers and people are saying to clean the iacv. 2012 Honda Civic Forums did the warm engine idle relearn and idles *almost* perfect. Damage to the car's carburetor and vacuum hoses can cause the engine to misfire, resulting in a rough idle. Using this idle screw, you can raise and lower your Honda Civic idle as needed. After towing the car to FL, and receiving it back from a body shop (overdue work, not a recent collision), I noticed it was idling weird. The Honda Civic is Canada's passenger-car sales champ. OWNERS MAY CONTACT HONDA AT 1-800-999-1009. So, this seems to be a pretty common issue, but I've yet to see anyone find a solution. One thing that has changed is the miss is random at idle and also under 2500 rpm. If you have a Surging idle on Honda, read this post. To view links or images in signatures your post count must be 0 or greater. Why idle problems on '07 Civic after resetting computer? 4 Answers. asked by Pam W. Very sporty looking car and I get compliments on it. I have a 1998 Honda Civic with > 200k miles. My 2002 Honda Civic randomly stalls. Not terrible shaking but noticeable. It is hard to figure out exactly when it will happen. Three dealers checked the system fluid level, pressures and leak tested the system. It has like no power, takes forever to get up to speed, idles rough in and out of gear, I get a very heavy gas smell, and I can only start it like once a night and then the cylinders flood and the spark plugs soak. P0505 2000 HONDA CIVIC Meaning This system automatically controls engine idle speed to a specified level. Honda Hot-Start Hesitation May Be Caused by a Main Relay Problem. I also have a 1997 Honda Civic Hatchback DX and haven't had any problems with it. turn back on and drive like you normally would. my a/f ratio at idle is about 12. To learn more, see reviews below or submit your own. 2010 Honda Civic EX Sedan My Honda civic is a very dependable car. I recently replaced the transmission mount and gave it an oil change to no. 5 rough running when warm: tommyboy33: 6. THAT is definitely NOT normal. 2002 Mitsubishi Eclipse GT Unstable Idle (Rough Idle, Hunting) By. I reset the ECU because it was recommended on a Civic forum; didn't make any real difference in fuel economy or rough idle. I have a 1987 Honda Civic hatchback DX and it has over 261,000 miles. However, it is easy to recognize the problem, as during rough idling either the engine would run at an irregular rate or it may have varying RPMs without your foot on the gas pedal. Honda Car Forum - Accord Parts Civic Tuning Acura Racing > Discussion > Honda Technical: What causes a low moaning noise when turning either right or left sharply on a 99 Honda CRV? The Honda Odyssey is a minvan that was first introduced in 1994. 3 to 5 seconds, then it will smooth out again. Honda Accord: Why Does My Car Idle Rough? Your car is in "park," so why does it want to drive? This article will discuss some of the potential causes and solutions to fix this stubborn car problem. I need some help. 1988 Honda Accord won't idle when warmed up. I have a 2000 ford ranger xlt 4x4 with 177000 miles. When one or more of these variables is off it can lead to a rough idling condition. The check engine light came on next so took it to the parts store. Shut off & start a couple hours later & engine cuts out when trying to accelerate in first gear. and shutters when starting, and it started this past weekend, its at the shop and it isnt communicating with the computer??? any suggestions and awaiting call from shop. It feels like it is about to stall, but goes back up to 550-600, like a hiccup. Happens all the time. Has rough idle when this happens -clears up in 60 seconds. I also have a 1997 Honda Civic Hatchback DX and haven't had any problems with it. However when coming to a traffic stop or other non-moving situation warm then hot air blows out the vents. Idles good at initial start (very cold in Ohio) but after 5 minutes begins to idle rough. Thankfully, that's changed for 2017 as Honda has finally brought the Type R Stateside. But if I turn on the interior fan, then car idles smoothly with very little steering wheel vibration. I recently cleaned out the throttle body on my 08 si 2 weeks ago. Is there a way to - Answered by a verified Mechanic for Honda We use cookies to give you the best possible experience on our website. Best Answer: 1. On the way to work last week, my Accord died on me when I took it out. Three dealers checked the system fluid level, pressures and leak tested the system. I have a 2007 Honda civic,as soon as the weather gets cold my car starts to run rough,the temp. I don't think I've owned a 4-cyl Toyota or Honda that didn't occasionally, usually after a warm restart, run a little rough at idle and sometimes hesitate when accelerating from a stop. I'm pretty sure it never goes under 700, and rarely drops to 600 temporarily. Q: Im having rough idle on cold starts for 5 to 10 seconds then back to normal. Left the service and got same problem just after 1/2 mile. After driving and letting car sit for 1+ hour so engine is still warm but not freshly hot I get a rough idle/engine miss for about 5 seconds. I've check for vac leaks, I beleive all hoses are routed correctly. Re: 99 civic rough idle Thanks for the input. cylinder 1,2,4, comshaft misfire. b18c1 loping at idle when its fully warmed up and hot outside. The radiator is the primary heat exchange for the engine, and airflow is crucial. I tried articulating this issue before, but failed. never tracked. The noise is usually more noticeable when the engine is warm. The MIL is active with a glow plug fault and also a FICM communications fault according to my tech 2. Now the idle is unstable. I recently replaced the transmission mount and gave it an oil change to no. Let the engine operate long enough to warm up enough to reduce the idle speed to a normal idle. Went to the honda service where they cleaned throttle bode, reset the valves and said it was the problem. The k24 is a relatively big motor and to help fuel economy, the idle is set as low as possible. my a/f ratio at idle is about 12. The idle air control (IAC) valve in a Honda Accord controls the idle speed through the throttle body. The piston rings on certain cylinders may rotate and align which can lead to spark plug fouling. Why would a 1989 Honda Civic LX that starts up fine idles very rough until it warms up? Answer. never tracked. The idle of a car engine is kind of like a human heartbeat: You can tell what shape it's in just by listening. If your civic is having other idle problems, first run a OBD-2 scanner then replace non working sensors and idle air control valve. Description HONDA IS RECALLING 128 MY 2008-2009 CIVIC SEDANS. Changing the Timing Belt - Honda Civic Changing the Water Pump - Honda Civic Engine Coolant Temp Sensor - Honda Fuse and Relay Box - Honda Civic General Maintenance Schedule Inspecting the Idle Air Control Valve - P0505 Jerky steering wheel Fix - Honda Civic Jump start your car battery - Honda Civic. Discharge pressure abnormally low Excessive bubbles in sight glass; A/C condenser is not hot. The 2003 Honda Accord, 2001 Honda Civic and 2002 Honda Odyssey appear to be the worst years for transmission failure. Cooler air is denser than warm air and so. Hello! 2007 civic coupe, automatic. You depend on your Honda Civic to get you from work to school to home as efficiently as possible. Honda Civic Repair Manuals. 1985 Honda Civic CRX Si 1. It still runs well except it idles a bit rough, and I haven't done anything to it except change oil in the last 3 years. Rough Engine Idle: One of the most common symptoms of faulty fuel injectors is an extremely violent or rough engine idle. When the car is in Park, Neutural or Reverse it doesnt feel rough. What does this mean? OBD2 Code P0511 Honda definition: This system automatically controls engine idle speed to a specified level. The car ran fine but when I installed a thermostat it ran rough when warmed up and idling. Re: 99 civic rough idle Thanks for the input. The bigger issue is that the truck has a very rough and choppy idle. RepairSurge covers the following production years for the Honda Civic. it's the Hot Rod equivalent of putting a fart can and hot air intake on your Honda Civic Last edited: Feb 25, 2011. Got an intermittent low and rough idle on my 2007 Honda Civic LX. So if you have a rough idle with your 4 cylinder Honda, this might be a contributing factor to your rough idle. Tech Tip: Honda Engine Knocks or Ticks at Idle. Honda Civic Forum > General > Honda Civic Discussion > 7th Gen. I thought I might have to rebuild the carb, but it's good to see that it is now a pretty common issue and I'm not really losing my mind!. and when you start it up it runs ok until it reaches operating temp. 21, 2000 " Called the service rep today, my 2001 EX is going in for a new radio tomorrow! That's one of three problems eliminated so far (on a. when the car gets hot it goes away? the exhaust has only been on for a week could this be the issue? or is it just bad gas? thnx for the help!. 2001 Honda Civic rough idle & stalling I have a 2001 Honda Civic, with approx. Increased idle, go until in drive in hot weather. Free Same Day Store Pickup. Page 1 of 2: How to Test Misfire Codes (1. The problem is that the car once is warmed up, idles too low, almost at the 0rpm line but probably around 200-300rpm, however the needle looks like its all the way on zero. If the main relay bad on a Civic, How to Fix a Rough Idle or Stalling Car. A couple other things I would look into:. 7th Gen Honda Forum - The #1 Community for 2001-2005 Honda Civic Enthusiasts > General > > General >. Thankfully, that's changed for 2017 as Honda has finally brought the Type R Stateside. Get reliability information for the 2016 Honda Civic from Consumer Reports, which combines extensive survey data and expert technical knowledge. The center console has two cup holders plus a storage that can be hidden. Wiki User In hot weather my Honda Accord 2000 starts but idles rough and dies. I just bought a 2000 honda civic ex with 54k miles on it. dealer has had me run audi fuel additive for two tanks and the problem persists. This is what allows the engine to idle instead of cut off when your wheels and transmission stop, such as when you're at a traffic light. My '07 CR-V with a/c on, and after a warm restart, will briefly idle a little rough. It is a great vehicle! Gas mileage is good. I'm suspecting some sort of vacuum lines having leaks or collapsing because of the heat. My 1996 Honda Civic started to die at idle the other day but only after it warms up, so when i'm in traffic it dies most of the time at stop lights but after the engine warms up. it's. Left the service and got same problem just after 1/2 mile. 2002 Honda Civic EX 1. I'm pretty sure it never goes under 700, and rarely drops to 600 temporarily. Allow the cooling fan to come on at least once. Depending on the year, the Honda Civic may have a dryer or an accumulator, but never both. The bigger issue is that the truck has a very rough and choppy idle. Connect a tachometer. High idle and constant up and down idle on my 94 civic ex? Okay so im learning lots about Honda's, i have rebuilt motors and put them but i cant seem to figure out my own motor!! My car idles really rough, it sounds like a vacuum leak but i cant figure it out. 7 has the dreaded head gasket issue, so its two inner cylinders leak positive pressure into the coolant jacket when hot under load. I thought I might have to rebuild the carb, but it's good to see that it is now a pretty common issue and I'm not really losing my mind!. SOLVED Low bouncing idle when hot honda RobFour1Four. check the fans and see if they're cutting in and doing their normal cycle, check that the compressor clutch is cutting in, should be able to tell that quite easily. Very sporty looking car and I get compliments on it. Free Same Day Store Pickup. then it starts - Answered by a verified Mechanic for Honda We use cookies to give you the best possible experience on our website. I have a 1990 Accord EX, 116,000 mi. Many people are confused about how idle air control valves work. it says for customer concerns of rough idle MIL on and missfire codes first check the valve clearance, if valves are not in specs REPLACE THE CYLINDER HEAD. American Honda Motor Co. When your AC compressor kicks in or power steering is activated as you suddenly turn the steering wheel, the sudden drag o. It controls idle speed fluctuations and adjusts the basic idle speed by supplying air to the intake manifolds according to the: † engine coolant temperature † alternator load † throttle valve position The IAC also controls fast idle by providing more air to the engine during warm up. When cold, or sitting overnight only, vehicle starts up fine, however has rough idle, loud exhaust vibration sounds in interior, is worse in reverse backing out of driveway.