Will not idle - 1988 Chevrolet Silverado 2500

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:-----Bad miss at idle? http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html
-----------
Stumbling and stalling at idle after engine rebuild? http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

------------
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

--------- Engine stumbles coming off idle when warm?

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

------------------
Erratic idle on car?

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

-----------

Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html
---------- Low idle when cold out side?

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

-----------

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

GMC Idle Air Control (IAC) Valve Replacing?

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

-------------
1996 Camry intermittent engine failure while idle?

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

------------
Engine quits at idle?

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

-----------
Car overheats and Air blows hot at idle?

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

---------

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

While stop engine idles like cylinder missing?

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

---------
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

--------
High rpm in neutral? Inconsistant high RPM in neutral?

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

-------
Vehicle stumbling at idle and shows code 54?

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

----------
Rough idle, staling and Erratic shifting? http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html
-----------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.

Nov 23, 2012 • 2001 Ford Escape

0helpful

1answer

High idle on cold start on a 86 dodge d50 2.0 liter

For rough idle issues and problem troubleshooting,go through the help links provided below :-----van idles rough?

http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html

---------
will not idle when cold?

http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

----------
runs lean and idles rough?

http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html

-----------
Engine stumbles coming off idle when warm?

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

------------
Erratic idle on car?

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

----------
Low idle when cold out side?

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

---------
Idle Air Control (IAC) Valve Replacing?

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

-----------
Replace Idle air control valve?

---------
Test Idle Air Control (IAC) Valve?

-------
Idle Air Control (IAC) Valve operation?

----------
Engine quits at idle?

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

------------
Car overheats and Air blows hot at idle?

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

------
While stop engine idles like cylinder missing?

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

---------

This will help.

Thanks.

Feb 27, 2012 • 1986 Dodge Pickup 4WD

Question 2

Vincent G

Chevrolet Master 2,363 Answers
Posted on Dec 14, 2009

Vincent G

Chevrolet Master

Joined: Jul 09, 2009

Answers

2363

Questions

4

Helped

1032983

Points

5917

Low / uneven idle problem can cause by a lot of components.

Dirty air filter

Dirty injectors + o-rings

Vacuum leak at intake manifold and vacuum hose.

Bad Idle Air Control Motor (IAC)

Low compression (170 psi + is OK)

Start cleaning and repair these trouble spots and see is there any improvement.

====

For more advance DIY'er then you may try this.

Use a can of Berryman carburetor clean to locate the vacuum leak.

SEE SAMPLE PICTURE HERE

This is a 20-30 minutes job.

Vacuum leaks can occur in following locations.

Intake manifold AND/OR vacuum lines.

Intake manifold is not accessible unless the engine head if off.

You can still check the potential leak by spraying some Berryman near the intake manifold.

Listen for rpm increase after you introduce the Berryman (FUEL) at idle.

Do the same starting from the brake booster unit (the round unit) on the drive side fire all.

Carefully listen for increase of RPM right after to spray the Berryman to the potential vacuum spot.

Get a friend to HEAR the ROM increase or monitor for RPM on the tech.

DO NOT AIM the Berryman into any heat source.

PLEASE RATE my answer if it is useful to you.

Answer 2

Anonymous

Master 4,669 Answers
Posted on Sep 02, 2009

Anonymous

Master

Joined: Feb 27, 2009

Answers

4669

Questions

0

Helped

1847602

Points

16674

Idles so low it dies and you have to keep your foot on the gas or it runs fast and won't return to idle?

Related Topics:

Trustworthy Expert Solutions

Will not idle - 1988 Chevrolet Silverado 2500

2 Answers

Add Your Answer

Attachments: Added items

Related Questions:

Car engine idles really high then really low, why?

Ford Expedition IAC valve replacing

Bad miss at idle?

Stumbling and stalling at idle after engine rebuild?

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

Engine stumbles coming off idle when warm?

Erratic idle on car?

Low idle when cold out side?

GMC Sonoma Stalls and idles low

GMC Idle Air Control (IAC) Valve Replacing?

1996 Camry intermittent engine failure while idle?

Engine quits at idle?

Car overheats and Air blows hot at idle?

While stop engine idles like cylinder missing?

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

High rpm in neutral? Inconsistant high RPM in neutral?

Vehicle stumbling at idle and shows code 54?

Rough idle, staling and Erratic shifting?

While stop engine idles like cylinder missing?

Does not idel well some time engin light comes on missies for 2 secomds

Ford Expedition IAC valve replacing

Bad miss at idle?

Stumbling and stalling at idle after engine rebuild?

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

Engine stumbles coming off idle when warm?

Erratic idle on car?

Low idle when cold out side?

GMC Sonoma Stalls and idles low

GMC Idle Air Control (IAC) Valve Replacing?

1996 Camry intermittent engine failure while idle?

Engine quits at idle?

Car overheats and Air blows hot at idle?

While stop engine idles like cylinder missing?

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

High rpm in neutral? Inconsistant high RPM in neutral?

Vehicle stumbling at idle and shows code 54?

Rough idle, staling and Erratic shifting?

While stop engine idles like cylinder missing?

1999dodge intrepid 2.7 lite idle low

Ford Expedition IAC valve replacing

Bad miss at idle?

Stumbling and stalling at idle after engine rebuild?

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

Engine stumbles coming off idle when warm?

Erratic idle on car?

Low idle when cold out side?

GMC Sonoma Stalls and idles low

GMC Idle Air Control (IAC) Valve Replacing?

1996 Camry intermittent engine failure while idle?

Engine quits at idle?

Car overheats and Air blows hot at idle?

While stop engine idles like cylinder missing?

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

High rpm in neutral? Inconsistant high RPM in neutral?

Vehicle stumbling at idle and shows code 54?

Rough idle, staling and Erratic shifting?

While stop engine idles like cylinder missing?

I have a 98 Malibu when I turn it over it runs rough then dies

Ford Expedition IAC valve replacing

Bad miss at idle?

Stumbling and stalling at idle after engine rebuild?

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

Engine stumbles coming off idle when warm?

Erratic idle on car?

Low idle when cold out side?

GMC Sonoma Stalls and idles low

GMC Idle Air Control (IAC) Valve Replacing?

1996 Camry intermittent engine failure while idle?

Engine quits at idle?

Car overheats and Air blows hot at idle?

While stop engine idles like cylinder missing?

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

High rpm in neutral? Inconsistant high RPM in neutral?