Question about GMC K2500

1 Answer

Gmc sierra rough idle

My 1995 GMC idles rough i changed the map sensor throttle sensor heat temp sensor and still no change

Posted by on

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.

  • GMC Master
  • 15,478 Answers

What are your injectors doing?

Posted on Mar 25, 2014

5 Suggested Answers

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

elshaddai159
  • 1016 Answers

SOURCE: 92 gmc 350 pickup....rough idle..have replaced MAP

This could be a couple of things:

  1. Check that you have not got any vacum leaks between inlet manifold and cylinder head.
  2. Check your spark plugs and HT leads are in good condition and not worn, reset gaps. If worn replace them.
Worse scenario is the head gasket make be leaking water into a cylinder. Get a cylinder leakage test done to verify any manifold air leaks or faulty sealing head gaskets.
Good luck, let me know how you get on.

Posted on Apr 02, 2010

  • 2926 Answers

SOURCE: My 2003 GMC Sierra Idles Rough And Cut Off

Before replacing the O2 sensors, I would check the fuel pressure. You may also try to have someone pull a trouble code from the powertrain control module to verify why the engine light is on. Do not replace any parts until this is done, otherwise your going to be guessing at the root cause, and it will get expensive with part replacement.

Posted on May 12, 2010

Testimonial: "Trouble code P0101 {Mass Air Flow}and code P0332 Knock Sensor.Thanks i saved a lot money."

emissionwiz
  • 75235 Answers

SOURCE: 1995 gmc sierra 5.7 350. rough idle in gear when warmed up poor fuel miledge. changed vacum lines between throttle body and pvc,t-body and evap can. purge solenoid ,egr and map sensor.egr engine code

It sounds like you may have low compression in one or more cylinders, suggest you run a compression test, this should always be done when this condition exists and igintion is not source of problem. This engine also can have issues with intake manifold leaks, use a can of carburetor spray and spray around the intake gasket are to cylinder head, if a leak is present then the idle change when you hit the leak.

Posted on Dec 08, 2011

  • 157 Answers

SOURCE: my 1192 gmc sierra idles correctly with the map sensor unplugged

did you clean the port before you replaced the iac valve, and measure the pntle before putting it back in, whenyou buy a new iac valve you can't assume the pintle(needle) is correctly placed. the pintle shldnt exceed 1 1/8 inch past the body seat, it can be pshed in by hand, then after it's pu t back in cycle ignition on for 10 second (do not start) then turn ign off for atleast 10 seconds, this allows the iac valve to reset. then start engine.

Posted on Aug 27, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Where is the aic on a 94 sierra


Its located right on the throttle body. If your talking about the air intake temp sensor, thats mounted by the air filter or in the plastic tube that goes off the throttle body to the air box, its a 2 wire hook up. The idle air control "iac" is located on the throttle body side. "iac" idle air control. "ait" is air intake temp. 2 totally diff sensors.

Feb 20, 2013 | 1994 GMC Sierra

1 Answer

Fast idle 90 GMC Sierra


if you haven't disconnected the battery try that next

May 24, 2017 | 1990 GMC Sierra

1 Answer

Problems with my 94 k1500 / changed idle control valv / map sensor / throttle control sensor /plugs,wires,cap,rotor ,and fuel filter / these are all the things i have bought but nothing i have done will...


it might be the ECU, when cold the computer raises the iddle to warm it up, when reaches temp., it dropes it down to normal iddle, but it might not know where the correct iddle is, it might be another sensor like a cam, map, throttle position senssor.

Dec 05, 2010 | 1994 GMC Sierra

1 Answer

2000 gmc starts but then idles rough then dies


I had to replace the mass air flow sensor. $ 150. the engine would shut off when driving too.changed fuel filter only worked for a day. The sensor is just after air filter.

Nov 27, 2009 | 2000 GMC New Sierra 1500

2 Answers

1995 GMC Sierra


Just a thought, have you checked yout TPS(throttle position sensor)? I had similar problems with my 89 GMC Jimmy 4.3l, however a code 44 is strange. Also check to see if your problems go away if you advance the timing a few degree's.

Hope this helps

Jun 15, 2008 | 1995 GMC Sierra

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

Related Topics:

152 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75197 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

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

Answer questions

Manuals & User Guides

Loading...