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  #1 (permalink)  
Old 07 Sep 2019, 10:41 am
markeele's Avatar
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Default Missing really bad

Okay I have a cylinder 1 misfire I have new plugs new wires new coil new cam position sensor and still a bad misfire so at this point do I assume that it is fuel-related and that maybe I have a bad fuel injector or what's the advice on where to go from here any help would be greatly appreciated thanks
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Old 07 Sep 2019, 10:51 am
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Default Re: Missing really bad

These cars tend to be very fussy with aftermarket coils. Even brand new ones will often not work correctly right out of the box and the problem is still there. To rule this out, you can go to any junkyard and buy a used coil from any PT or Neon and try it. It may very well solve your problem.
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Old 07 Sep 2019, 12:43 pm
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Default Re: Missing really bad

There are technically 2 coils in the coil unit so unless you have a continuity at the terminal you would have 2 cylinder misfire DTCs of problems on one side of the coil.
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Old 07 Sep 2019, 02:55 pm
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Default Re: Missing really bad

It's a common issue on these cars for the last foot of the wiring harness from the coil connector wears out internally and encounters high resistance only under load so it's not something that can show up on a resistance test. A common sense first troubleshooting step is to perform a resistance test from each pin on the coil connector to its corresponding connector and pin once disconnected from the ECM.
There's also pre-fabricated connector and tail repair kits sold on ebay and other stores since this can be a common issue with the SRT-4 engines and PT cruiser engines.
I had this exact problem before and since then have solved it.
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Old 07 Sep 2019, 03:18 pm
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Default Re: Missing really bad

Quote:
Originally Posted by NitroPT View Post
There are technically 2 coils in the coil unit so unless you have a continuity at the terminal you would have 2 cylinder misfire DTCs of problems on one side of the coil.
True, but when my coil went bad, I only had one cylinder misfire code and not two. A replacement coil from my local U-pull yard solved the issue.

Before I started replacing connectors, I would try a coil. It may not be the case for your car, but it is a fairly common failure now that these cars are getting old and higher mileage. I have helped several in the past and while it could be other things, such as bad wiring as suggested, or even a PCM failure, usually it is the coil.
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Old 07 Sep 2019, 04:09 pm
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Default Re: Missing really bad

Quote:
Originally Posted by myckee View Post
True, but when my coil went bad, I only had one cylinder misfire code and not two. A replacement coil from my local U-pull yard solved the issue.

Before I started replacing connectors, I would try a coil. It may not be the case for your car, but it is a fairly common failure now that these cars are getting old and higher mileage. I have helped several in the past and while it could be other things, such as bad wiring as suggested, or even a PCM failure, usually it is the coil.
If you look at the electric schematic of how theses coil pack work then it is very hard to consider how this could happen unless there was a terminal problem?


The PT cruiser is a waste spark ignition system please think about that before you answer.


I do understand that at times simply the replacement of a part new or used at times the act of movement can sometimes cure the problem by establishing a lost continuity.


This guys issue I can almost grantee is not a coil....but then I would be guessing in which a guess (estimate or suppose (something) without sufficient information to be sure of being correct) is something I truly dislike members on forum to do. LOL


IMHO this guy should really spend less time on the coil and to do more diagnostic checking of other things including the fuel injectors and compression of the cylinder.
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Last edited by NitroPT; 07 Sep 2019 at 04:20 pm.
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Old 07 Sep 2019, 05:59 pm
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Default Re: Missing really bad

Maybe a little more info would help, it seems to run fine as long as im on the gas but as soon as i let off it starts stumbling and missing. Which is why im thinking maybe fuel, thanks for the advice so far,
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Old 07 Sep 2019, 07:02 pm
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Default Re: Missing really bad

Quote:
Originally Posted by markeele View Post
Maybe a little more info would help, it seems to run fine as long as im on the gas but as soon as i let off it starts stumbling and missing. Which is why im thinking maybe fuel, thanks for the advice so far,
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Old 07 Sep 2019, 07:13 pm
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Default Re: Missing really bad

Yes replaced about 6 months ago
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Old 08 Sep 2019, 10:01 am
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Default Re: Missing really bad

I had the same thing and was told it was my coil. I changed it with a new one and the problem went away , for a few minutes then returned . hahaha! After which I spent a couple weeks buying all the tune up parts and old hoses trying to fix the misfire. Finally I read here on this forum in another thread somewhere about swapping the fuel injectors from another working cylinder in the engine. When I did that the misfire went to the cylinder with the questionable fuel injector. So bought one new fuel injectors and the problem was gone.
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