Question about 1991 GMC S-15 Jimmy

1 Answer

Severeal cylinders misfire

1997 Chev 1/2 ton 4x4 several cylinders misfire runs rough, but clears up. Idle speed is very fast, also

Posted by on

  • Anonymous Mar 13, 2014

    truck begins missing at low idle but clears up at speed afm disabled
    but misfires occuring on afm cylinders

  • Anonymous Mar 23, 2014

    rough idle 5.3 engine misfire cylinder 1

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 15 Answers

Sounds like the TPS (throttle position sensor) usually located where the throttle body meets the intake manifold. It may need re-calibrating or renewing.

Posted on Feb 06, 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

2006 ford five hundred - engine code P0301. When first starts, no issues, but then idle gets rough and car loses power. Miles from home with no tools but willing to do whatever.


P0301 cylinder # 1 misfire !
P030x - Cylinder x Misfire Detected Description: NOTE: x represents cylinder number 1 through 9.
The misfire detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause. Possible Causes:
  • Ignition system
  • Fuel injectors
  • Running out of fuel
  • EVAP canister purge valve
  • Fuel pressure
  • Evaporative emission system
  • EGR system
  • Base engine
Diagnostic Aids: The malfunction indicator lamp (MIL) blinks once per second when a misfire severe enough to cause catalyst damage is detected. If the MIL is on steady state due to a misfire, this indicates the threshold for emissions was exceeded and caused the vehicle to fail an inspection and maintenance tailpipe test. Application Key On Engine Off Key On Engine Running Continuous Memory All - - GO to Pinpoint Test HD . Could be an ignition coil !An to replace it the intake manifold has to come off !

Aug 01, 2015 | Ford Cars & Trucks

1 Answer

Missfire cylinder one 2007 chev impala


We need the exact code numbers, not someone's description of them.

Aug 24, 2014 | Chevrolet Impala Cars & Trucks

2 Answers

1999 jeepn wrangler 4 cyl 5 speed rough idle


rough idle is from faulty injectors or maf/vaf sensors or vacuum leaks
run the fault codes to determine the fault area

Jun 09, 2014 | 1999 Jeep Wrangler

1 Answer

1997 chevy blazer gets a po300 code and runs rough with no power. any suggestions?


p0300 is an engine misfire detected p0301 would be misfire detected on #1 cylinder and so no throught p0306SOo seeing its not related to any one cylinder i would check the crank shaft position sensor first because that and the cam shaft sensor is what detects all misfires Itcould also be caused by any of these sensors TP MAP IC VS ECT throttle position -manifold absuliute press -idle control -vehicle speed -engine coolant tempature By the way are you getting any codes or is your mil light on if so you should read the codes thatcould tell more then any one on line good luck

Oct 29, 2010 | 1997 Chevrolet Blazer

1 Answer

1998 Chev Astro 4.3L AWD. Rough idle & misfire Cylinder 6


Hi, the 4.3 liters have an injection system on them that can leak and will show up as a misfire. it is common but elusive to find. you might consider taking the van to a repair shop to have the problem diagnosed and go on from there.

May 22, 2010 | 1998 Chevrolet Astro

1 Answer

98 chev 3.1L runs rough and dies at idle


Check the DIS module or injectors. Check to make sure you have a spark on each cylinder. One cylinder could be misfiring

Mar 05, 2010 | 1998 Chevrolet Lumina

2 Answers

P0302 cylinder 2 misfire detected enginge revs


P0302-Cylinder 2 Misfire Detected How do I track down the problem and fix?

Dec 10, 2009 | 2001 Hyundai Elantra

1 Answer

1997 Bonneville - Engine light code P0303


the code you have is for a misfire on #3 cylinder. (im sure you knew this right?). the crankshaft position sensor will not cause one individual cylinder to misfire. what i typicaly do in this scenario is switch the ignition wire off of the guilty cylinder onto a known good firing cylinder and see if misfire moves to the other cylinder. i repeat this process by switching the spark plug and finaly the fuel injector. a compression check may be in order as well (but not a likely cause) unless you have access to a tech 2 (gms diag computer) you will need to clear this code after each component is moved and see if you get a new code ie :p0304 if switched to #4 cylinder..other wise if you do have access to a computer that has a misfire chart in its features you can quickly identify the guilty component. as i side note the ignition coil may also be faulty, but i believe your vehicle has a 3.8liter meaning that it has a coil pack....switch the others i listed and see ow you make out....good luck!

Jun 11, 2009 | 1997 Pontiac Bonneville

2 Answers

Cylinder 1 and 4 misfire on my 1997 Ford Explorer


The code description is a giveaway.
It could be one of the coils on the coil pack. Most coils nowadays do two cylinders each. This way car makers can get away with one coil for two cylinders.(lowers costs) One spark fires the air fuel mix in one of the cylinders and the other will fire the cylinder on the exhaust stroke. If the coils are removable, and you are fairly handy with cars,switch two around, the problem will follow the bad coil.

Dec 02, 2008 | 1997 Ford Explorer AWD

Not finding what you are looking for?
1991 GMC S-15 Jimmy Logo

160 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

63291 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21981 Answers

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

Answer questions

Manuals & User Guides

Loading...