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Cylinder 3 misfire

 
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Old 25 Aug 2008, 06:44 pm
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Default Cylinder 3 misfire

Hi, I am having problems getting rid of the cylinder 3 misfire on my pt cruiser. I recently changed the plugs and the wires and the misfire still continued. Anyone have any other suggestions or ideas i could try?
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Old 25 Aug 2008, 06:58 pm
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Default Re: Cylinder 3 misfire

Welcome to the forum. I found this in a search. It's from a Tech at a Chrysler dealer. I believe the mini-van's have the same 2.4 engine we have in the PT Cruiser.

Subject: 2001 Chrysler no.3 cylinder misfire

QUESTION: I have A 2001 Chrysler town and country minivan and the number 3 cylinder is misfiring I've replaced the plugs and wires and did an ohms test on the fuel injectors they are good but the problem still exists what should i check next? Could it be the coil pack ?

ANSWER: possible yes check compression on that CYL.

---------- FOLLOW-UP ----------

QUESTION: I did a compression check and it was fine I'm running out of ideas for that van. Could an 02 sensor cause all of thisor does it just effect the emissions?

ANSWER: An o2 sensor would cause more then just one cyl to miss plus an o2 sensor does not cause a miss. You might have a burnt valve.

---------- FOLLOW-UP ----------

QUESTION: IS THERE ANY WAY TO CHECK THE COIL?? IS THERE A WAY TO CHECK FOR A BURNT VALVE WITH OUT DISASSEMBLING THE ENGINE
OR WHAT ABOUT THE CRANK POSITION SENSOR?

Answer
Swap the plug wires from 3 to where ever you can get one close. If the miss moves from there to the one you put it on then I would say coil or wire.

You would need a bore scope to check for burnt valves with out taking apart the engine.

A crank sensor does not affect one cyl.

------------------------------------------------------------------------
Another answer from a Master Tech:

The P0300 code is a random misfire code while all the other misfire codes denote a misfire problem in a specific cylinder. The last digit in the code tell a misfire in cylinder number one.

If a misfire in a specific cylinder should lead you to check the spark plug, fuel injector and compression.

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

Check all of these and you'll run right into your problem area.

Last edited by CREWZIN; 25 Aug 2008 at 07:04 pm.
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Old 29 Aug 2008, 05:12 am
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Default Re: Cylinder 3 misfire

thanks a lot hopefully i can get this thing fixd.
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Old 30 Aug 2008, 08:43 am
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Default Re: Cylinder 3 misfire

Where is the EGR valve on the 2.4
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Old 30 Aug 2008, 09:03 am
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Default Re: Cylinder 3 misfire

Here ya go....




Last edited by CREWZIN; 30 Aug 2008 at 09:19 am.
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Old 30 Aug 2008, 07:02 pm
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Default Re: Cylinder 3 misfire

thanks again. i will follow up once i get some time to mess with it.
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Old 30 Aug 2008, 07:54 pm
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Default Re: Cylinder 3 misfire

I thought my 2.4 might be the same as the ones you guy's have in your PT's, I don't see a EGR valve on the 2.4 I have in my '04 Jeep Wrangler, it does share the same SKIP as with the rest of the 2.4's!! It's driving me nuts! I've replaced just about everything short of the crank & cam sensor's.
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Old 30 Aug 2008, 08:29 pm
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Default Re: Cylinder 3 misfire

Not sure about the Wranglers but only the 2001 and 2002 PT Cruiser 2.4 have the EGR tube from the rear of the upper manifold to the EGR valve itself. Chrysler found away of doing away with the tube in the 2003-2004 models but still had the EGR valve itself and something happened in 2005 because I can't even find an EGR valve or gasket from 2005 onwards.
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Old 30 Aug 2008, 08:49 pm
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Default Re: Cylinder 3 misfire

Ya, the one I have is a '04 and I couldn't find anything that looks anything like a EGR. This skipping thing is getting REAL OLD!!! The dealer said they'd never worked on a Wrangler with a 2.4 in it! And yet they sell PT's, makes ya want to buy one from that dealer,,,, right! I did tell the dealer owner that I'd NEVER buy anything from them ever again, have never been treated so badly as with Skinner & Damulis in Ridgefield Springs NY.
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Old 30 Aug 2008, 11:27 pm
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Default Re: Cylinder 3 misfire

Quote:
Originally Posted by michalo187 View Post
Hi, I am having problems getting rid of the cylinder 3 misfire on my pt cruiser. I recently changed the plugs and the wires and the misfire still continued. Anyone have any other suggestions or ideas i could try?
fuel injector nozzle could be plugged...that's what caused mine to misfire...
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