Question about 1988 GMC C1500

1 Answer

88 GMC C1500 idle problem

1988 C1500 with the 5.0L. When I get it running usually takes about 5 times, it's idling rough and on the verge of dying. If I touch the gas pedal it dies. Fuel pump is good as well as the filter.

Posted by on

  • sparker18 Jun 14, 2009

    If I tried to give it gas occasionally it would backfire through the throttle body.

  • sparker18 Jun 14, 2009

    Anybody else got any ideas?

×

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 365 Answers

Unfortunately, the ECM isn't "OK"...Get a read on the computer and go from there...if I had to guess I'd say ALL the O2 sensors are fouled...especially if you use gas additives or starting fluid.
Good Luck
P.S. did she ever backfire on you?

Posted on Jun 14, 2009

Ad

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 1988 GMC 1500 with a 305 the problem is that it wont idle I found that if I pull the vacum line off the MAP sensor it is fine for 30 seconds then dies I got a new map sensor and nothing chan


Change the PCP valve and run the heater. This should take care of it. You only have to run the heater one time as this is controlled by the vacuum system. This will cause your motor to run proper.

Apr 09, 2012 | Cars & Trucks

1 Answer

1988 gmc 5.7l engine, changed, iac motor, map sensor, fuel press. regulator, fuel pump, fuel filter, timing gear and chain, distributor, has no cat. converter , yet still cranks a long time before...


i have the same exact problem, i have replaced fuel injectors, idle position sensor, idle air sensor, map sensor, temperature sensor,. the only way i can make mine run ok. not great is unpluging the map electrical connector, and it still has no power if u gas on it but it makes it down the road and smells rich, if u find out let me know what the problem was i really love my truck and hate that it doesnt run right, Redemmett21@aol.com

Jan 12, 2011 | 1988 GMC C1500

1 Answer

97 chevy pu 305 vortec, had cyl 6 misfire and rough idle, replaced fuel injector spider now engine starts but idle real high then dies


thats usually a sign of a vacuum leak, recheck and make sure you don't have any loose hoses, or cut intake seals

Nov 12, 2010 | 1997 Chevrolet C1500

1 Answer

81 GMC 1/2 ton... rough idle when warmed up


You may want to adjust the idle on the carb (if it is carbed). Also check the air fuel mixture.

Jun 04, 2009 | 1988 Chevrolet C1500

2 Answers

My 1998 Olds 88 has been stalling and running rough.


Check and clean the IAC valve. Idle Control Valve. Use brake cleaner or carburater cleaner . Remove the duct work from the air filter assembly. It is located just inside . Run the engine at 1200 rpms and spray the valve. The valve can also be removed and cleaned.

Jan 07, 2009 | 1998 Oldsmobile 88

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

378 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76051 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

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

Answer questions

Manuals & User Guides

Loading...