Question about 2002 Jeep Grand Cherokee

1 Answer

I keep getting a number cylinder misfire indication tried changing plugs still getting indication

Posted by on

  • 1 more comment 
  • dkrippa Oct 03, 2010

    please list what engine you have

  • gwizman2 Oct 03, 2010

    It is 4.0 six cylinder

  • cheap repair Oct 03, 2010

    unplug the fuel injector for that cylinder. does the engine run the same? If so the injector is stuck or broken. Do you have spark to the plug? measur the resistance through the injector and compare to a good injector, if the results are the same then try this. as a last ditch solution before replacing the injector is to grab a 3/8 long extension, put one end on the injector and tap the other end with a hammer...The injector is made of cheap stuff so dont hit it hard just tap it....oh this has to be done while the engine is running. It may dislodge whatever is causing it to stick

×

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
  • 327 Answers

Yes thats what i thought its the crankshaft sensor located on driver side top of trans bellhousing make sure if you replace it hold it down while you tighten the bolt it has a few thousands of an inch of adjustment and it makes a difference . price it from an autoparts store they are a lot cheaper than a dealer. this will help

Posted on Oct 03, 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:

1 Answer

Misfired cylinder 6, replaced coil, plug Misfired cylinder 5, replaced coil, plug Misfired unsure which yet, all of these happening within a week. It will run fine for a day or so after rep


change all plugs with proper ones - they are picky for some reason - do not change number or brand from original - coils were probably ok, - get some injector cleaner and run through it but check for exhaust leak at e g r tube - is a common over looked cause of misfire - a thing to keep in mind is misfire isn't always spark issue. hope I was of some help

Apr 20, 2014 | 2003 Lincoln Town Car

1 Answer

Check engine flashing


this usually indicates a cylinder misfire. Two things you can do.

1. remove the coils or wires one at a time until you find the cylinder that is not working. Than inspect the components on the cylinder (plug, wire, coil, etc)

2. scan the computer for codes. You should get a P030X (the X will be a number 1-6 depending on what engine you have). whatever number is shown is the cylinder that is misfiring. for example P0304 would be a number four cylinder misfire, P0302 would be a number two cylinder misfire.

Dec 05, 2011 | 1998 Honda Accord

2 Answers

My H3 keeps giving me a code for multiple cylinder misfire. What's up with this?


Check for some P0300 - Random/Multiple Cylinder Misfire Detected
Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.

A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.

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 P0300 may mean that one or more of the following has happened:
Faulty spark plugs or wires
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Stuck/blocked EGR valve / passages
Faulty camshaft position sensor
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.

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Keep us updated.

Apr 24, 2011 | 2006 Hummer H3

3 Answers

CODES-PO301-PO303-PO316- CHANGED PLUGS & WIRES. STILL MISS ON START UP, GOES AWAY MOST OF THE TIME ABOVE 1000 R.P.M


P0301 - Cylinder 1 Misfire Detected.

Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak

Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

P0303 - Cylinder 3 Misfire Detected.
Follow info from P0301.

P0316 - Misfire Occurred In The First 1,000 Engine Revolutions.

Causes:
- Damaged CKP sensor.
- Ignition System.
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Base engine
- Damaged Powertrain Control Module

Solutions:
Usually the P0316 is combine with a P03XX codes. The P03XX code indicates in which cylinder the misfire occurred.

Jan 17, 2011 | 2002 Mercury Sable

1 Answer

The code po300


A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it indicates to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring.Or p0303 will indicate cylinder number three is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing,It just means that any of the cylinder or cylinders are misfiring.In this case all the cylinders are to be checked one by one to confirm which one is faulty causing this. The reason of this misfire is due to any of the following parts mentioned :---

A code P0300 may mean that one or more of the following has happened:

  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer

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,etc. 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.

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Get all this details checked by your regular car maintenance mechanic.And replace the faulty.This will help.Thanks.Helpmech

Nov 14, 2010 | 2001 Chevrolet Suburban

1 Answer

WHAT IS THE CAUSE OF THE PO301 CODE?


The error code p0301 ,This code is related to misfire.The cylinder is misfiring. p0301 this is the indication of cylinder number 1 ,that is misfiring.If the code comes up as p0300 this is the indication of random misfire from all the cylinders.But in your case its indicating p0301 this is indication of cylinder 1 misfire.Check cylinder 1 and replace the faulty cylinder 1 to clear the fault.The spark plugs and the wires connecting to spark plugs also needs to be checked. Keep updated with any more query.Thanks.

Oct 12, 2010 | 2003 Mitsubishi Lancer

2 Answers

1998 ford ranger, number 3 cylinder mis fires.


I would think its in the coil pack and I would change it out.

Nov 29, 2009 | 1998 Ford Ranger SuperCab

1 Answer

I keep getting a P0300 diagnostic code on my 1996 chevy corsica what could be the cause for this


its a random misfire if it had a number at end instead of 0 e.i. 1 that would indicate number 1 cylinder misfired/ but 300 with no other codes can be multi reasons check spark plugs and wires--coils--clogged injectors--fuel filter--fuel pump--bag gas(water) partial clog cat converter these are a few but best to start with plugs &wires

Oct 26, 2009 | 1996 Chevrolet Corsica

1 Answer

It has a number 2 cylinder misfire. I have already had the plugs, plug wires, and the back coil changed, and it still says it has a number two cylinder misfire. What can I try next?


misfire caused by leaking in the intake valve you must chek it , or may be your car is working rich that means fuel - air mixture is not on the right ratio so check your oxygen sensor

May 30, 2009 | 1999 Ford Windstar

2 Answers

#4 cyl misfires/code 304


P-0304 indicates number 4 cylinder misfire. Are you using Toyota parts dept spark plugs? More often than not, non-toyota plugs make the v-6s run poor, right out of the box....
Try this:With the engine running, pull the connector wire off of the #4 injector. Note to see if there is any change with the idle quality. No change? You may have a bad injector.

Aug 12, 2008 | 1997 Toyota Tacoma

Not finding what you are looking for?
2002 Jeep Grand Cherokee Logo

107 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

76070 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

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

Answer questions

Manuals & User Guides

Loading...