Question about 1998 GMC Envoy

1 Answer

My car cylinder is miss firing (cylinder#2) and has failed inspection and the re-test as well, problem seem to be code # P0302 how much would this problem cost me to solve? any help is appreciated.

Posted by on

  • mieleman Aug 27, 2015

    This is usually caused by a bad ignition coil pack. Each cylinder has its own coil. Just swap it with another, clear the code, and go for a drive. If you swap it with cylinder three, a bad coil pack should return a code of P0303 after a few minutes. If so, you have your answer. Just pick one up at the store or get one online and you're all set. I wouldn't drive that way too long. Unburned fuel is entering the exhaust system and could ruin the catalytic converter.

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 836 Answers

There are several things that could be causing this problem, from a bad spark plug, igntion wires, distrubtor cap, injection , no compression in that cylinder. Try the simple things first = plugs, wires, cap etc. a bad note: these are known to have the injector "poppets" fail with no warning. Go there when all else fails. good luck.

Posted on Dec 29, 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,
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:

3 Answers

I have a 97 Dodge Ram 1500 with a 5/9 in it I put plug wires on it and now it's popping and it lost power and it had a code po302 and Po 307


The P0302 code means that the cylinder 2 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 2. If the problem persist more tests needs to be done. PO307 is the same thing except number 7 cylinder. Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation

Nov 29, 2015 | Dodge Cars & Trucks

1 Answer

PROBLEM CODES;P0301,P0302,P0304,P0300,P1399,07-02,09-02,07-03


po301 to po304 are miss fire codes, 301 cylinder 1, 302 cylinder 2 Etc, p1399 means that this must be a Honda manufactured vehicle. All are misfire codes, Could be plugs, wires, coils. ETC, Check and you will find the problem. God-Bless!

May 23, 2015 | Cars & Trucks

2 Answers

Why won't my car start?


P0300 multiple misfire
P0302 misfire cylinder 2
P0306 misfire cylinder 6

Apr 25, 2015 | Cars & Trucks

3 Answers

Error Code P0302 1996 Volvo 850 GLT


Diagnostic Test Code (DTC) P0302 has a generic description of "Cylinder Misfire - Cylinder Number 2".

A misfire simply means that when it came time for that cylinder to fire, it missed its chance.
There are many things that can cause a misfire. Some of the things are listed below. Diagnostics should be performed to eliminate the possible causes so you don't spend a lot of money replacing parts trying to "guess" what is causing it.

These are just SOME of the possible causes:

> Spark plugs
> Ignition cables
> Ignition coil
> Distributor cap (if equipped)
> Fuel injector
> Fuel injector circuits
> Burned engine valves
> Blown head gasket
> Cracked cylinder head
> Piston damage
> Cylinder block damage
> Broken valve springs
> Damaged camshaft
> Vacuum leaks

Sep 10, 2011 | 1996 Volvo 850

1 Answer

Missing,viborating


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The vibrating tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

Jun 23, 2011 | 2009 Ford F-150

1 Answer

Vehicle missing,shaking,engine light comes on


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The shaking tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

Jun 23, 2011 | 2004 Ford F150

1 Answer

I had this code PO300, P0302, and p0301. I changed my spark plugs but engine wont't start.I'll like also to know the probable causes of misfiring too,please.


300 is multiple cylinders miss fire, 301, 302 you have cylinder 1 and 2 miss fire. check your wires and fuel injectors on those cylinder

Feb 27, 2010 | 1992 Lexus Es 300

2 Answers

P0302 , My check engine light keeps going on and off with this code. I have failed inspection twice because the light was off and then popped on again in the bay while idling. It always comes on when the...


Cylinder #2 Misfire Detected
What does that mean? A P0302 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #2.
Symptoms Symptoms may include:
  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
Causes A code P0302 may mean that one or more of the following has happened:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer
Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Oct 02, 2009 | 2004 Chevrolet TrailBlazer

3 Answers

Where is #2 cylinder on 2000 jaguar s type 4.0?And what is code p0302


I recently starting having this problem also (only code p0305/308). That code means "miss-fire" on #2 cylinder. The #2 cylinder is the nearest cylinder on the right (closest to front of car on drivers side) if you are standing in the front of the car.

Jul 12, 2009 | 2000 Jaguar S-Type

Not finding what you are looking for?
1998 GMC Envoy Logo

Related Topics:

183 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76848 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

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

Answer questions

Manuals & User Guides

Loading...