Question about 1988 GMC C1500

1 Answer

'88 GMC 1500 Idles fine, but dies when accelerator is pushed

I've got a 1988 GMC 1500. It idles fine but when I push on the accelerator it sputters a bit and dies. I've already changed the fuel filter and spark plugs. I took off the distributor cap and cleaned the contacts and the rotor. I disconnected the fuel line from the carb and had a good stream of fuel (I don't have a test kit to check the actual pressure). I checked the readings across both injectors. They each read 1.6 ohms, which is a bit high (Haynes says they should be between 1.16 - 1.36 ohms), but since they both read the exact same I hoped they might be alright. I'd really appreciate any good ideas before I have to send it to a shop.

Posted by on

  • fostemc07 Apr 12, 2009

    I am having the same problem. However, the engine will run when I push the accelerator but only if I disconnect and remove the PCV connection to the carborator. The engine idles really high. It is a new PCV valve but there is some residue on both stems (valave and the carborator intake) looks like oil. Any solutions?



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 328 Answers

Have you considered the tps?

Posted on Jan 20, 2009


1 Suggested Answer

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Sputtering during acceleration ... with some true backfires

check fuel pressure sould be aprox 34 psi, ckeck tps voltage should be 1 volt at idle

Aug 10, 2012 | 1988 Ford F 150

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

Ford truck idles fine but sputters and dies when gas is increased

I have a 1989ford econoline motor home I live in Victoria Australia the problem I have is that it runs on gas and petrol there is a part that fits on air hoses from carnie to air cleaner it looks like a set of burn oculars 2hoses fit in one endadnd 2hoses at the other end we can not find the part any where in Australia

Feb 17, 2012 | Ford Econoline Cars & Trucks

1 Answer

Jeep starts and idles perfect no acceleration,

Sounds like the catalytic converter or muffler are clogged. There isn't much exhaust at idle, but when you accelerate your exhaust volume increases, thus if your catalytic converter or muffler are clogged the restrict the exhaust escaping out thus causing an excess of back pressure which won't allow the engine to breathe normally.

Jul 16, 2009 | 1988 Jeep Comanche

1 Answer

88 GMC S15 starting plus other problems

REplace the fuel filter, then check for vaccum leakes around the intake. My guess is the carb it close to falling off! LOL Frankster016

Dec 07, 2008 | 1988 GMC S-15

1 Answer

88 bronco II 2.9L with problem

try replacing the fuel pressure regulator

Sep 02, 2008 | 1988 Ford Bronco II

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

Related Topics:

214 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

82322 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22382 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides