Question about 1992 GMC Sierra

1 Answer

Runs rough till warmed up. Hesitates. I put a new

Runs rough till warmed up. Hesitates. Surges. I put a new TPG on it, carb cleaner, new O2 sensor

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 11,896 Answers

Ok, you got new 02 sensors, that is good, Now check timing, vacuum hoses for leaks, check for headgasket leak with compression test, Check or change fuel filter and plug wires. If fuel injected, try using injector cleaner and you can also remove one injector at a time to make sure it is not leaking or plugged. You can also test throttle position sensor and idle position sensor with an ohmmeter to see if they are good.

Posted on Nov 17, 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:

2 Answers

02 f150 5.4 runs ruff after it warms up


Check the throttle plate for varnish or carbon build up , clean with throttle plate cleaner . Have engine sensors scanned with a scan tool ,mass air flow sensor may be dirty . I'd tell you to check fuel trims with scan tool but you are probably not familiar with these . They show how much fuel the engine computer is adding or subtracting . Great diagnostic tool for trouble shooting engine running problems . Also a scan tool is great to check O2 sensor switching rich to lean an back to rich signal . The engine runs in open loop when cold which means the PCM doesn't look at O2 sensor data till warmed up . PCM/ECM adds more fuel till warmed . Then it will go into closed loop fuel control , the PCM/ECM watches O2 sensors . May have a vacuum leak ,check with can spray carburetor cleaner ,spray around the intake manifold an listen for the engine RPM to pick up or may even stall the engine. Understanding Short Term and Long Term Fuel Trim

Dec 06, 2015 | Cars & Trucks

1 Answer

Chey s10 starts but runs rough till warm


The first thing to do is to run the fault code and find the area that is being affected . It could be MAF sensor or low fuel pressure or faulty injector or faulty coil/s. It is a waste of money guessing until you know the codes

Apr 28, 2014 | 1994 Chevrolet S-10

1 Answer

My car will start and run and runs good for a few


Carb is a possibility but that sounds more like o2 sensors, when its cold its fine but once warmed up runs rough. Once the engine is in closed loop operation rough run could be caused by o2's, and engine coolant temp sensor. On those older computerized engines those sensors are the major components to tell the computer what to give the engine for a fuel mixture.

Mar 18, 2010 | 1987 Chrysler Fifth Avenue

1 Answer

O2 Sensor Problem?


yes an o2 sensor can cause those symptoms so can a minor vacuum leak --bad ignition wire -clogging fuel filter --sticking egr valve etc.

Mar 01, 2010 | 1999 Toyota 4Runner

1 Answer

When starting cold it turns over and runs for 2 sec. then stalls. Does this 2-3 times then will idle low til and runs rough till warm . When warm runs like a top.


Have the choke setting on your carb checked. if its fuel injected model---have the air and temperature sensors checked out

Nov 09, 2009 | 1988 Jeep Wrangler

1 Answer

1998 chvy 1500 loses power


check the intake gaskets. in the middle front and middle rear. If they are oily, it more than likely sucked part of the gasket in. When it warms up the leak gets bigger. The easy way to check is to get some carb cleaner and spray all around the intake while idling and warm. DO NOT SPRAY ANY EXHAUST PARTS , carb cleaner is combustible. The truck should stumble or even shut off when spraying with the carb cleaner if there is a leak.

May 03, 2009 | 1998 Chevrolet K1500

1 Answer

91 gmc idles rough and engine surges when driving


It maybe the fuel pressure rugulator inside the EFI Unit. Sorenson makes a rebuild kit with all the gaskets, screens and regulator for about $30. An EFI is the most simplest carb you can rebuild. Check the Hanes manual or U-Tube to see how.

Aug 14, 2017 | 1991 GMC K2500

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

Related Topics:

257 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76649 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

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

Answer questions

Manuals & User Guides

Loading...