PT Cruiser Forum  
Advertisements
       

Go Back   PT Cruiser Forum > General Forums > Tech & Performance Forum

PT Cruiser Forum

Advertisements
Persistent Check Engine...Help please!

 
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 13 Jul 2011, 04:41 pm
Fresh Cruiser
 
Join Date: Jan 2010
Posts: 9
Default Persistent Check Engine...Help please!

Good Morning!
I have a 2006 PT cruiser, 2.4, coding with a P0004 (fuel volume regulator control circuit high) and P0304 (misfire in cylinder 4). I have: swapped out all the spark plugs for dealer spark plugs and spark plug wires, fuel injectors, new coil pack, intake gaskets, new fuel pump, tried de-carbonization with Seafoam. I have done everything short of pulling the head. Anything anyone can think of? Any idea what could be causing these codes or how to remedy them? I am beating my head against a wall and completely out of ideas…

Thanks in advance!
-Samantha
Reply With Quote
  #2 (permalink)  
Old 13 Jul 2011, 05:01 pm
Obsessed Cruiser
 
Join Date: Sep 2001
Posts: 27,743
Default Re: Persistent Check Engine...Help please!

Samantha, Why on earth would yo spend all that money throwing parts at your cruiser not knowing if they would cure your problem? Sounds like something a dealer would do at the owners expense.

Now for your codes. I'm not sure where you looked up that P0004 but the ONLY place I've found that code is on the VW forum. The codes don't go that low for a PT Cruiser.

Your misfire in Cylinder #4 is a popular code and if the plugs and wires, injectors and coil pack were changed as you said, you need to look for a vacuum leak around the upper manifold.

Best thing right now is to take the negative battery cable off for 5 minutes to clear the old codes and see what new code(s) pops up.

You also didn't say what is happening because yo have the code. Rough idle, hesitation, breaking up at high speed? What?
Reply With Quote
  #3 (permalink)  
Old 13 Jul 2011, 05:12 pm
Fresh Cruiser
 
Join Date: Jan 2010
Posts: 9
Default Re: Persistent Check Engine...Help please!

Sorry, shoulda said, my mom owns a mechanic shop so, the parts are much cheaper than they normally would be, I did all the work, so no labor, I really am just not wanting to tear apart the engine, I work pretty far from where I live, so losing my car for half a week isn't really my favorite option. No vacuum leaks, upper manifold is sealed. I am using a code scanner, and it is pulling the P0004 and the misfire, so it is there, even though it shouldn't be on a PT. It idles rough when the code is on, and codes if the AC is running at an idle. The strange thing is that when it codes it will switch every so often with the P0004 coded and P0304 as a pending code, I'll clear it and read it and it will come up with P0304 as a code and P0004 as a pending. With other cars, my mom has had what dealers call "phantom codes" in that the code does not relate to the car it is coding on but is rather just coming up with the other code for some reason. I think the real issue is the misfire, but I can't pinpoint the issue, just wanted to see if someone else has had the same issue...
Reply With Quote
  #4 (permalink)  
Old 13 Jul 2011, 05:12 pm
Fresh Cruiser
 
Join Date: Jan 2010
Posts: 9
Default Re: Persistent Check Engine...Help please!

Oh, also, at speed no issue, code will sometimes clear at speed then recode at an idle...
Reply With Quote
  #5 (permalink)  
Old 13 Jul 2011, 05:23 pm
Obsessed Cruiser
 
Join Date: Sep 2001
Posts: 27,743
Default Re: Persistent Check Engine...Help please!

Well, that all helps but I'm out of suggestions. You replaced everything that most people have a problem with but I didn't hear you say that you did a compression check and maybe find out if #4 is low (which wouldn't be good).
Reply With Quote
  #6 (permalink)  
Old 13 Jul 2011, 05:26 pm
RaineMan's Avatar
Cool Cruiser
 
Join Date: Aug 2010
Location: SL,UT
Posts: 271
Default Re: Persistent Check Engine...Help please!

Have you considered swapping fuel injectors around and seeing if the problem moves?

The misfire in #4 could be fuel related.
Reply With Quote
  #7 (permalink)  
Old 13 Jul 2011, 05:30 pm
Fresh Cruiser
 
Join Date: Jan 2010
Posts: 9
Default Re: Persistent Check Engine...Help please!

Compression is perfect, swapped injectors, code still in cylinder four. I spoke with a Chrysler tech, he said that the 2.4 has an issue with carbonization, makes the valve not close all the way because of the build up, and I should come in and have him run a decarb, but that runs at about $150 and I really don't enjoy how dealerships like to run up the bill without asking... he also though it would probably come to pulling the head so no help...
Reply With Quote
  #8 (permalink)  
Old 13 Jul 2011, 05:48 pm
Obsessed Cruiser
 
Join Date: Sep 2001
Posts: 27,743
Default Re: Persistent Check Engine...Help please!

You can clean everything up yourself with 1 can of Sea Foam. Maybe 2 if you want to throw a second can into the gas tank.
Reply With Quote
  #9 (permalink)  
Old 13 Jul 2011, 05:55 pm
Fresh Cruiser
 
Join Date: Jan 2010
Posts: 9
Default Re: Persistent Check Engine...Help please!

Any specific way? I've run half a can through it twice, finishing half the can that i didn't use on the valves in the gas tank both times... it did run and idle beautifully for about a day after each treatment, but after a couple days in the 120 degree heat of Arizona it started coding again. It did keep it off longer than anything before though. Think I should just keep treating it a few more times?
Reply With Quote
  #10 (permalink)  
Old 13 Jul 2011, 06:10 pm
Regular Cruiser
 
Join Date: Jun 2011
Posts: 199
Default Re: Persistent Check Engine...Help please!

How are you applying the Seafoam? Are you doing the recommended feed a little in, feed a lot in, shut it down & let it sit for a while? That's the best method.

However, that said, Seafoam isn't that great in the scope of crazy decarb-ing chemicals. GM used to make "Top Engine Cleaner" which was AMAZING. They reformulated it, and now it's less good. I understand the second best thing in the world is "Mopar Combustion Chamber Cleaner." I'd pick up a couple cans of that vs. Seafoam. I think you will have superior results.
Reply With Quote
Reply

Tags
misfire fuel p0004 p0304


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 Engine misfire and flashing check engine light fg1911a1 General Turbo Discussions 15 26 Jul 2014 06:20 pm
check engine lite on thewhizard Northeast PT Forum 2 05 Jan 2011 04:25 pm
Check Engine=Most Annoying mjb457 Tech & Performance Forum 1 02 Jan 2011 09:32 pm
check engine light ccprez Testing 12 16 Mar 2008 08:22 am
CHECK ENGINE BORICUA General PT Cruiser Discussions 9 10 Aug 2004 07:58 am


All times are GMT -5. The time now is 09:30 am.




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