PT Cruiser Forum  
Advertisements
       

Go Back   PT Cruiser Forum > 2.4L Turbo Forums > Turbo Performance

PT Cruiser Forum

Advertisements
I have no hair left p0300 p0303 misfire

 
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 25 Aug 2016, 09:07 am
Fresh Cruiser
 
Join Date: Aug 2016
Location: boise
Posts: 1
Send a message via Yahoo to rrob69ewf
Default I have no hair left p0300 p0303 misfire

Post sounds simple enough I know.
I have a 2003 gt with auto trans. I bought it for my daughter to drive to school(student teacher on a budget).
I knew it had a misfire when I bought it and assumed it would be simple.

Old owner replaced
ECM, cam position sensor, plugs, wires, coil(x2)

It misfires mostly when warmed up, I can drive it 10 miles with no noticeable issues. Then is might start misfiring while going down the highway or I might park it for 5 minutes and come out and it runs rough. Or it will run fine again for a while.

I have replaced
timing belt w/all pulleys tensioners ext, crank position sensor, plugs again,

No change noted.
I took this to a very reliable mechanic and it started as maybe a timing belt. Obviously not the case. Possible injector?
I am leaning towards a wiring issue somewhere but I could really use some knowledge.

Last edited by rrob69ewf; 25 Aug 2016 at 09:14 am. Reason: added infor
Reply With Quote
  #2 (permalink)  
Old 25 Aug 2016, 09:40 am
rckstein's Avatar
Banned
 
Join Date: Dec 2010
Location: Texas
Posts: 15,518
Default Re: I have no hair left p0300 p0303 misfire

Welcome to the forum
Reply With Quote
  #3 (permalink)  
Old 25 Aug 2016, 10:31 am
Veteran Cruiser
 
Join Date: Aug 2015
Location: Lake Wales, FL
Posts: 4,714
Default Re: I have no hair left p0300 p0303 misfire

Welcome to the forum. Did anyone bother to check the magnet behind the cam sensor? Maybe it's cracked.
__________________


Aspire to inspire before you expire.
Reply With Quote
  #4 (permalink)  
Old 25 Aug 2016, 11:28 am
Obsessed Cruiser
 
Join Date: Aug 2014
Location: Thousand Oaks, CA
Posts: 7,301
Default Re: I have no hair left p0300 p0303 misfire

Welcome to the forum.

Did this problem come up right after the timing belt was replaced or before?

Are the spark plug wires okay?

Has there been a engine compression check on all cylinders?

Have you tried Techron Injector cleaner(that is safe for CAT) to clean the injectors if the engine compression is good on all cylinders?

Has the codes been reset several times by a OBDII scan tool and the same codes come up P0300 and P0303?
__________________
If at First You Don't Succeed - Try, Try Again
Reply With Quote
  #5 (permalink)  
Old 25 Aug 2016, 03:33 pm
Fk5 Fk5 is offline
Senior Cruiser
 
Join Date: Jul 2011
Location: Colesville, MD
Posts: 1,828
Default Re: I have no hair left p0300 p0303 misfire

Aluminum turbo manifold? Check the gasket. Usually blows out at #4, but still a likely possibility.

My step by step...
Pull the #3 plug and wire - swap the #3 wire with the #2 wire and the #3 plug with the #4 plug. With the aluminum intake you can do this without pulling it. Did the code follow the plug or wire? If so, there is your problem. If not...

Pull the upper manifold and fuel rail with injectors. Look in the #3 injector port - is there a chunk of intake gasket blocking it? If so, pull the lower and change the gasket. Do a compression test, is #3 way low? If not, swap the #3 injector with another. Did the code follow the injector? If so, there is your problem.

Mildly time consuming, but total expenditure is +/- $7 for an intake gasket and you probably located your problem.

If you didn't pull your lower intake, the gasket may still be the problem.

EDIT: I know the prior owner replaced... I never trust the prior owner. Sometimes even when it was my Dad!
__________________
2003 GT 5 speed
162,000 miles

Last edited by Fk5; 25 Aug 2016 at 03:43 pm. Reason: Don't trust others!
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
2004 2.4 turbo with dtc p0303 & p0300, 53K Miles golfkell Turbo Performance 9 17 Mar 2019 09:20 pm
Misfire Codes P0303 and P0304 Ahuggs General PT Cruiser Discussions 6 09 Dec 2015 04:36 pm
2007 PT P0303 Misfire WalterCat Tech & Performance Forum 15 24 Oct 2015 09:36 pm
P0300 - P0303 misfire detected yannla Tech & Performance Forum 14 26 May 2015 11:52 am
2001 PT Cruiser - P0303 Misfire Maqcro Tech & Performance Forum 3 25 May 2015 10:02 am


All times are GMT -5. The time now is 10:45 pm.




Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
vB.Sponsors