Question about 1999 GMC Jimmy

1 Answer

I have a 99 Jimmy with 4.3 engine. I have bad missing in the engine. I have replaced all wires, plugs, cap and rotor. This unit is still missing and setting a general misfire code. I have no vacuum leaks either. What is up with these systems? No problem starting it, it will start right up. Can't seem to pinpoint the problem.

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I found the problem and 99 jimmy is running great now. the major problem was the intake manifold gaskets sucking air and causing random misfire codes(bad fuel/air ratio) but also we pulled the distributor as well because from 87-99 the drive gear was made of soft material and sure enough 3 teeth on the dist gear were almost worn right off. We also replaced this with 120$ new rebuilt unit.
Intake gasket kit is approx 100$ and no more than 2 hrs labour and the distributer is real easy to pull and replace once the intakes are off so this is a good time to check dist with little extra labour.

richard

Posted on Nov 05, 2010

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 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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My 98;jimmy will not start engine turns but will not turn on


check for spark at the plugs then check for fuel. if one of these are missing the car won`t start. common problem on some of these was the ignition module in the distributor and sometimes the pickup coil wires would break. another thing to check is the distributor cap and rotor for damage like a cracked cap or burnt through rotor. fuel pump were also common.

Sep 12, 2014 | 1998 GMC Jimmy

1 Answer

Missing


engine missing could be caused by faulty spark plugs and wires,bad ignition coils,dirty fuel injectors,leaking egr valve,low cylinder compression,intake vacuum leaks.many things will cause engine to miss, first do minor fix,replace distributor cap and rotor,replace spark plugs and wires,clean fuel injectors,replace fuel filter and air filter,if this minor tune up dont help engine and engine still missing, do a vacuum test and compression test to check condition of engine.engine could be worn out have low compression by worn valves and pistons rings.

Jan 04, 2012 | 1995 GMC Jimmy

1 Answer

I have a 98 honda accord 5 spd it has a 4cyl motor vtech i just need to know how to fix a miss fire in cylinder 2 and wich one is cylinder 2


Cylinder #2 is the the second spark plug counting from the right to left.
EX.Below are spark plug on engine
engine
-------------------------------
' (oil cap) '
' (4) (3) (2) (1) '
'_________________'

Your misfire can be cause by couple of things but the cheapest way that you can try to fix your car is to do a tune up by replacing:
1)all spark plugs
2)do a oil change
3)spark plug wires
3)distributor cap and rotor

note misfire can be cause by:
1.bad gas
2.spark plug and/or wire
3.distributor cap and/or rotor
4.valve adjustment
5.injector
6.off timing
7.ECM
8.bad wiring(power, ground or feed line)

Jul 08, 2011 | 1998 Honda Accord

2 Answers

My jimmy seems to be missing, but only when it rains, I would like some help. Mary


depending on what motor is in your Jimmy and if it still has a distributor, that is where i would start. moisture will get in side the distributor and cause a miss fire. This is a common problem with GM trucks that still have distributors instead of coil packs. Try haveing some one replace the cap and rotor or silicone around the cap and see if it seals.

Mar 10, 2011 | 1999 GMC Jimmy

4 Answers

SPARK AT COIL WIRE BUT NOT AT PLUGS


without looking at it i can only guess. Sounds like you need a new distributor cap and rotor arm. Hope this helps...

Mar 04, 2011 | 1989 GMC S-15 Jimmy

2 Answers

HI I have a 99 Jimmy with 4.3 engine. I have bad missing in the engine, I have replaced all wires, plugs, cap and rotor. I have replaced the EGR valve, I have replaced the fuel pump and now the injector...


Please help us. I have the same problem with my 99 Jimmy. I was driving on the highway going 70 and then it started missing. Changed all the plugs, wires, rotor and cap but to no avail. HeLP! please email me if you have a solution to this problem. (apollo.morelos@hotmail.com) thanks a bunch.

Oct 29, 2010 | 1999 GMC Jimmy

2 Answers

99 5.2 durango :pulled codes for multipe missfire cylinder #5-7


Aloha We have just replaced all of what you have replaced, plus water pump, fuel pump, pcv valve and 02 sensor. Took it to mechanic today we had misfire on 1,2,6,7. Mechanic said that the 99 dodge is known for bad computers, he checked ours and works great turns out that it was the coil. Ours was jumping 1/4 inch and had a orange/yellow spark. it is supposed to have a 1 inch spark and be blue. This has solved our problems after 527 dollars later.
Check the coil!

Feb 26, 2009 | 1999 Dodge Durango

Not finding what you are looking for?
1999 GMC Jimmy Logo

337 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

Marvin
Marvin

Level 3 Expert

81400 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22359 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

Loading...