Question about 1990 Honda Civic

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I cleaned my idle air control valve and my car stills sputter a lil on the low idling side. any suggestion

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  • roccaus2002 Dec 10, 2009

    exactly where is d egr valve located

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  • 244 Answers

Hello,

There's a number of things that could cause this problem; or does the car have a slight miss...your description is not really clear.

Possible causes:

  1. Bad EGR valve
  2. Clogged catalytic converter
  3. Tuning...to include all aspects (timing, distributor, cap, rotor, wires...ect.)
  4. A/C Idle contol sensor
In a nut shell you could spend allot of time and money chasing your tail...sometimes it's best to take the vehicle to a local mechanic that can run a diagnostics test to determine the cause ($65 to $90). Then based on the diagnosis...replace the part yourself.

HTH,

Mike...





Posted on Dec 10, 2009

  • Michelle Oliver Dec 10, 2009

    EGR valve is on the top of the valve cover...pretty close to the oil filler cap. Take the valve out...simply pops out of the rubber grommet holding it in place. If you shake it...it has a ball bearing check valve that should move up and down...freely inside the plastic case.

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I hooked my 95 Mazda mil up and says I need O2 sensor for bank 1 and 2 and also says I need engine speed circuit not sure wat to replace and wats really messd up please help


First is all always write down the codes you have present, it helps in closing down on the problem. I am assuming you have a 95 Mazda Milleinia

1. Start and run the engine and monitor the oxygen sensor signals and see if this sensor has bad readings still. Check for an open or shorted wire between the sensor and the Engine Control Module (ECM) if the signal is dropping out.

2. Listen for an exhaust leak in the area of the oxygen sensor, the leak could allow oxygen in to the exhaust and skew the sensor readings.

3. Inspect the ECM and ECM connector for signs of something that has been spilled on the ECM. Is the engine idling too high or too low then check this:-
1. Unplug the idle air control valve and turn the air bypass screw in to see if it will idle down. If it will idle down, adjust the idle speed to around 500 RPM's and then plug the idle air control valve back in.

2. If it still idles high, remove the air boot from the throttle body, block the air bypass ports with duct tape, hook the air boot back on and start it. This should make it not idle at all or just barley idle. If it does, the problem is in the idle air control valve.

3. If blocking the air ports doesn't cause it to idle down, the throttle plate must be sticking open. Clean the throttle plate really good and back the throttle stop screw off and then see if it idles down.

4. Verify the coolant level is not low and that coolant is circulating through the idle air control valve. Tech Tips: This idle air control valve is two valves in one. It is a fast idle thermo valve on one side and a duty cycle idle air control valve on the other.

I’m happy to assist further over the phone at https://www.6ya.com/expert/uttamjeet_2f3adc18600f8ede

Mar 30, 2015 | 1995 Mazda Millenia

1 Answer

2000 Malibu won't idle unless u hold gas a lil


Is the check engine light on ? Is the throttle body clean ? Is the idle air control valve working ?

Jun 30, 2013 | Cars & Trucks

1 Answer

Car engine idles really high then really low, why?


It can be issue with IAC( idle air control valve) causing the problem.


There are many other possibilities causing these idle issues. Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

Ford Expedition IAC valve replacing

http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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Stumbling and stalling at idle after engine rebuild?

http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

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1999 Ford F-150 Idles rough and quits when gas pedal is pressed less?

http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

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Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

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Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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GMC Sonoma Stalls and idles low

http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

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GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

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1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

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Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

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Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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High Idle Problem

http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

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High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

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Vehicle stumbling at idle and shows code 54?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

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Rough idle, staling and Erratic shifting?

http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

These details will help.

Thanks.

Feb 15, 2013 | 2003 Pontiac Grand Am

1 Answer

96 prizm stalling at stops. sputtering when accelerating and especialy when not accelerating. If I give it alot of gas it doesn't sputter or jump.


Sounds like your Idle Air Control valve is bad. The IAC valve controls the engine idle speed. The valve is located on the side of the throttle body. This valve allows the necessary amount of air, as determined by the (PCM) and controlled by a duty cycle signal, to bypass the throttle plate in order to maintain the proper idle speed. Good luck!

Jun 12, 2011 | Geo Prizm Cars & Trucks

2 Answers

Have an automatic transmission, 2001 Kio Rio. Problems when idling, sometimes high, sometimes low and will stall but starts right back up. I've replaced the Mass Air Sensor, spark plugs, air filter, coil....


It sounds to me like you have replaced everything except the most likely cause of your idle control problem...The Idle Air control. (IAC) (or Idle Speed Control Valve) It is located onthe throttle body and looks like the picture below.

dttech_3.jpg

Feb 22, 2011 | 2001 Kia Rio

2 Answers

On a 3.5 engine code reads low idle? any idea


LOW IDLE CAN BE CAUSED BY MANY THINGS.CLOGGED AIR FILTER. LOW COMPRESSION OR MISFIRE CONDITION.IDLE AIR INLET PASSAGE OR THROTTLE BORE IS DIRTY OR FULL OF DEPOSITS.IDLE AIR CONTROL VALVE FAILED.MASS AIR FLOW SENSOR COULD BE OUT OF CALIBRATION. THROTTLE PLATE THROTTLE SHAFT OR LINKAGE IS DAMAGED OR STICKING.PROBABLY HAVE REMOVE THROTTLE BODY ASSEMBLY REMOVE IDLE AIR CONTROL VALVE AND THROTTLE POSITION SENSOR.BUY CAN OF CARBURETOR OR THROTTLE BODY CLEANER SPRAY CLEAN ALL CARBON BUILT UP AROUND THROTTLE PLATES AND BORE.LET AIR DRY BUY A NEW THROTTLE BODY GASKET.

Jul 05, 2010 | Chevrolet Colorado Cars & Trucks

1 Answer

When my 1991 geo storm warms up the idle skips around.... it doesnt stall out it just sputters and gos from high to low idle


Sounds like your idle air control, or IAC valve. Take it off and clean it out with some brake cleaner. Carbon deposits and gunk can build up and prevent the IAC valve from operating properly, by causing it to stick. If cleaning it doesn't work, you may have to just replace it. It happened to me on my Sentra, tripping my check engine light, sputtering hard, idled crazy, no power, etc. But once I cleaned it off, it ran so smooth. You'll need to get a replacement gasket, though, or make your own out of gasket paper.

Feb 04, 2010 | 1991 Geo Storm

3 Answers

2002 camry le 4 cyl idles really really low, sputters, and turns off, i have to put it in park and keep reving it and when the light turns green quickly put it in drive and go or it will turn off. also,...


This vehicle is equipped with an electronic throttle control motot that operates the throttle plate. and controls the idle if your throttle plate is carboned up if will decrease air flow into the engine causing a low idle. This is very common if your battery was replaced or disconnected.

Sep 17, 2009 | 2003 Toyota Camry

1 Answer

Yukon xl 2003 when i turn air on sometimes it wil sputter or stale whats the problem


It sound like your air idle control valve may have gone bad or the wire harness has unclipped. The common problem is the air idle control valve has carbon build up. Try spraying Throttle body cleaner, (NOT CARBURETOR CLEANER)in through the throttle body. USE the whole can, just follow the instruction on the can. Once that has been done, turn the engine off, turn the ignition key to the run position for 30 seconds and then turn if off for 10 seconds then start it and let idle for 1 min and go for a test drive. If it's still stalling check all the wire connection to the air idle control valve and try cleaning it again. If that doesn't work then your going to have to replace the air Idle control valve. Try cleaning it first the cost of the control valve is around $100.00 give or take and most dealers will try cleaning it first before they replace it, since they know you'll be back for it to be cleaned again in the future telling you they manage to save you some money buy cleaning the one you have. Good luck and hope this helps.

Jun 15, 2009 | 2003 GMC Yukon XL

1 Answer

When i start my 1997 Geo Metro, it often sputters


Try this
Here are the most common causes of surges, stalls at stops, low erratic idle speed, rough idle and engine hesitation, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Apr 03, 2009 | 1997 Geo Metro

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