Question about 1991 GMC Sonoma

1 Answer

1991 Sonoma Idles high and somtimes wont idle

I changed the fuel pump and fuel filter on my 91' Sonoma recently and it ran again. The only problem is that it is idleing eratically. It runs this way most of the time. When its not idleing high, its not idleing at all. It goes back and fourth, but usually running very high.

Posted by on

  • 4 more comments 
  • Anonymous Feb 05, 2009

    Ive checked for vaccuum leaks by putting soapy water around the head gasket and I cant find anything. I used a piece of fuel hose as a stethescope and couldn't hear anything. Im just not sure what to try next.

  • Jesse Aug 19, 2009

    I solved the problem, it was the idle air control valve, $60 at napa auto parts. Thanks!

  • Roberta Smith
    Roberta Smith May 11, 2010

    sounds like it could be a vacuum leak

  • Anonymous Mar 22, 2014

    after starting up..it idles to high ant wont idle down where its suppose too..idels at 1400..should be at 900...when in park or neutral

  • Anonymous Mar 30, 2014

    put a new fuel filter in and valve cover gasket now it runs at high idle speed

  • Anonymous Mar 30, 2014

    1988 s15 runs at high idle after changing fuel fiter

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Check the fuel filter-they had a recall on replacement filters(fram?-just google GMC Recalls) or go to 91 GMC Sonoma Repair=many sites to tell you and download manuel. Then the library has books if you dont. Good luck and God bless1
Scoyboy

Posted on Mar 05, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

1996 sonoma 2.2 replaced fuel pump and filter cant get to run, idles smooth but dogs out when you push the throttle.


Check you fuel pressure AND flow. With line disconnected and in a suitable collection jug, you should be getting 2 litres + of fuel with the pump running for 30 secs. Have you got this? Let me know.

Sep 13, 2013 | 1991 GMC Sonoma

1 Answer

High idle


It's probably one of two things , a vacum leak or a bad ground.

Dec 23, 2012 | 1989 Chevrolet C2500

2 Answers

Ford 460 loses power then dies. Starts back up. Idles fine.


It sounds like you might have a clogged catalatic converter on the exhaust system.

Apr 23, 2010 | 1999 Ford Super Duty F 450

1 Answer

Fuel problem on a 91 sonoma 4.3


DID YOU CHECK THE FUEL PUMP FUSE AND RELAY.AND THE FUEL INJECTOR FUSE.SOUNDS LIKE FUEL PUMP NOT WORKING.YOU ARE NOT GETTING FUEL TO THE LINE.NOW IF FUEL PUMP IS RUNNING.THEN THE LINE COULD BE PLUGGED.

Sep 19, 2009 | 1991 Chevrolet S-10 Blazer

1 Answer

Drove 1991 gmc sonoma 1700 miles and now it wont start or idle...


check the play in the distributor,and check that the fuel pressure is normal

Aug 19, 2009 | 1991 GMC Sonoma

1 Answer

1994 sonoma stops running when it warms up


Replace you fuel Injector pump and check for any bad or clogged injectors. make sure idle adjustment screw is properly set 1ak+f4pj7cbm32cuniyi2gaaaaaelftksuqmcc

Apr 24, 2009 | 1992 GMC Sonoma

1 Answer

TRUCK SHUTS OFF AT IDLE


check the egr valve it sound to me that its stuck open and if this happens excessive exaust gases are flooding the intake or you might have a vacuum leak either one of these problems will make a high pitch sound

Aug 26, 2008 | 1991 Chevrolet S-10

Not finding what you are looking for?
1991 GMC Sonoma Logo

Related Topics:

461 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

70387 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...