Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #13  
Old 02-18-2012, 10:13 AM
New Member
 
Join Date: Feb 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
aggiedan2u is on a distinguished road
Re: Help! P0304 cylinder 4 misfire

I have a 2002 Jeep with a similar problem. It had a small ticking sound on the driver's side of the engine and would cut out when I went to pass someone or accellerate at a fast rate. If I backed off and gradually accellerated, it would do just fine. I used fuel additives in it and it seemed to be running smoother, but the fast accelleration in gear still produced this problem. Last night I went for a ride and about 20 minutes into the ride, I came up on a stop sign and from that point on, it acted like one of the cylinders was misfiring constantly. I got home and shut it off and refired it with the hood up and it was still there. This morning, i went out and restarted the engine and the misfire seems to have gone away. I had it checke dthe other day and the codes showed an intermittent misfire on the #3 and 4 cylinders. I drove it on a 120 round trip and got a little over 14 mpg, which was up from about 11 mpg before I had added the fuel treatment. I feel it is probably either an injector problem or maybe old fuel (The car sat for about 6 months and had 1/4 tank of gas in it) I filled the tank right after getting it and added fuel treatment. I was gonna try adding a injector cleaner to the gas to see if that was the problem. Any other suggestions?
__________________

__________________
Reply With Quote
  #14  
Old 02-18-2012, 10:18 AM
New Member
 
Join Date: Feb 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
aggiedan2u is on a distinguished road
Re: Help! P0304 cylinder 4 misfire

I forgot to add that when I reved the engine while it was out of gear before adding the fuel additives, it would sputter at higher RPMs but after adding the treatments. I tried it yesterday before going on the ride and the sputter seemed to go away. On the ride last night, the hesitation came back. I couldn't find a vacuum leak, and wonder if a vacuum leak might be the culprit.
__________________

__________________
Reply With Quote
  #15  
Old 02-18-2012, 10:32 AM
FlyinRyan's Avatar
Senior Member
My Jeep: 2002 4.7L WJ
 
Join Date: Jul 2009
Location: Fort Myers, Florida
Posts: 2,797
Thanks: 33
Thanked 29 Times in 28 Posts
Rep Power: 87939
FlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond reputeFlyinRyan has a reputation beyond repute
Send a message via AIM to FlyinRyan
Re: Help! P0304 cylinder 4 misfire

Coil pack(s)
Spark plugs
Fuel injector...

If not those....then the valve is hanging
__________________
Due to my workload, please do not PM me as I do not regularly check my PMs. Thank you :)
Reply With Quote
  #16  
Old 08-22-2012, 08:37 AM
New Member
 
Join Date: Aug 2012
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
JeremyAZ is on a distinguished road
Re: Help! P0304 cylinder 4 misfire

I have the same issue. What was your solution? What was at fault?
__________________
Reply With Quote
  #17  
Old 09-16-2012, 01:05 PM
SvenskaJeepGuy's Avatar
Let's Roll
My Jeep: 2006 4.7L WK
 
Join Date: Dec 2009
Location: Scranton PA
Posts: 13,068
Thanks: 137
Thanked 159 Times in 149 Posts
Rep Power: 1255205
SvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond repute
Garage
Re: Help! P0304 cylinder 4 misfire

Quote:
Originally Posted by JeremyAZ View Post
I have the same issue. What was your solution? What was at fault?
sorry i just saw this now. my problem ended up being a clogged injector.
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cold start misfire carldieselgc Export & Diesel Powered Jeep Models 3 10-20-2011 11:49 AM
Mixed plugs = Misfire & 10mpg ! NeilF Engine Performance/Intake/Exhaust 10 01-04-2011 05:56 AM
CYL#4 misfire violant00 Troubleshooting/Problems 5 12-06-2010 12:10 PM
Gas mileage on the '07 6 cylinder DLStryker Grand Cherokee - WK 7 06-26-2010 05:37 PM
Aluminum 4.0L Cylinder Heads caa0428 Performance Modifications 7 05-22-2010 12:20 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:33 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community