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 Post subject: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 6:37 pm 
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Hi new to the forum.I have a 1996 dodge neon the car runs great for about 20min until it gets warmed up then it dies and wont start until it cools down a little about 15min then it will start and run about 5 blocks and die this will keep repeating until you get home. I have replaced plugs,wires,coil pack,egr,cam sensor,pcv, and fuel filter.
When it dies you can spray starting fluid into the throtle body and it will try and run.Also disconected the line from the fuel pump and turned it over and it sprayed gas out the line.
Any help will be greatly appreciated.


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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 6:44 pm 
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Have the coil tested. Possibly that? not sure

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 6:48 pm 
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I put a new coil pack on the car but thanks for a quick reply.


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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 6:50 pm 
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Huh................................CEL? are you testing spark and fuel after it dies? And did it die before you put the coil on? :dunno:

Oh CEL= Check Engine Light Just in case

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 6:58 pm 
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It gave a code 22,42 after I learned how to do the key dance,but no check engine light. After the car dies is when i used the starting fluid and it tried to start so i figure it has spark and fuel is ok at the filter but seems to be getting shut down at the motor.


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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 7:12 pm 
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Oh sorry Head in my a**. I guess I didn't read the whole thing. okay I was throwing a code 22. It ended up being my head gasket. Are you showing any signs of a bad head gasket? With the code 22 witch is the coolant temp sensor. it made my car idle down and back up on it's own. Also if when it's cold you can pop the coolant cap off every few seconds there will be bubbles that come up because of the exhaust coming up through the coolant. Have you tried to change the fuel pump relay? You can use the horn relay to test it when it dies it's the same realy.

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 7:38 pm 
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We had the head gasket and the radiator replaced 2 years ago. just checked for bubbles didnt see any also just pulled the connections off the PCM to look for bad wires and found oil in the plug nearest the fender is that right?
I did try changing the relays


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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 8:41 pm 
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Team2bad4U wrote:
okay I was throwing a code 22. It ended up being my head gasket. Are you showing any signs of a bad head gasket? With the code 22 witch is the coolant temp sensor. it made my car idle down and back up on it's own.

I bet you have a bad CTS (Coolant Temp Switch), or you may have wiring harness / connector damage.

Without a properly working CTS, you PCM <--(engine computer) cannot "read" what temperature the engine is running at, and that will screw up the air/fuel mixtures to the point where the engine won't run.

I replaced the CTS on my '98 Neon with one from Auto Zone.
I don't recall how much I spent, but it was pretty inexpensive.

ANOTHER thing to look for, is the wiring harness itself. Check the wiring coming out the back of the PDC. (Power Distribution Center) near the battery.
The 'critical' area seems to be where the wiring comes out of the PDC, and necks around the back of the cylinder head, near the EGR valve. (Driver's side)
Sometimes, the harness will end up rubbing on the EGR tubing itself, or on the barbs for the heater hose clamps.

- Nick

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 8:54 pm 
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Thank you Nick I will check out the wiring and the temp sensor, What about the oil in the PCM is that normal?


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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 9:00 pm 
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treeman3x673miv wrote:
Thank you Nick I will check out the wiring and the temp sensor, What about the oil in the PCM is that normal?

You mean in the connector that plugs into the PCM ?? No, that's not normal..... but I've heard of that happening before.

My *guess* is that your wiring harness soaked up the oil from a valve cover leak (or possibly a cam sensor leak), and it wicked down to the connector......

- Nick

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-1999 4-dr DOHC ATX= UDP, Kirk Intake
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-1971 Ply.Scamp SL6cyl. (TRADED for '83 Ddg.Rampage)
-1968 Chry.300 w/440 V8 (sold)
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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 10:00 pm 
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Would the oil in the PCM plug short out the PCM or cause it to shut down the motor .
Another question does the PCM wait until the engine is warm until it starts monitering the engine?(I was told this by a friend)


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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 10:16 pm 
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I had a 96 neon that did the same exact thing.
only it turned out that the fuel pump was getting ready to crap out.
it eventually just stopped starting all together.

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 10:42 pm 
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but after it dies I can take the fuel line off the fuel filter and crank it over and it dumps fuel out the line . is it not sending enough pressure?


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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 11:09 pm 
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this can happen when the crank sensor goes bad as well. Early neons are prone to this as well.

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Fri Feb 27, 2009 11:46 pm 
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I was told the wiring harness could be to blame also.I pulled the cover off the harness from crank sensor back about 6 in and the wires to that sensor seemed to be not melted but formed together and when they crossed another wire in the big harness the wires were stuck to it . Is this normal or has the wiring got hot and what would cause it?


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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Sat Feb 28, 2009 5:53 am 
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treeman3x673miv wrote:
What about the oil in the PCM is that normal?


Oil travels to the PCM via the wiring and is due to leakage at one of the sensors, most commonly the oil pressure switch and camshaft position sensor, but also sometimes the crankshaft position sensor. Check the sensors and replace the one with the leak. Dunno if oil in the PCM actually does any damage, though.

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Sat Feb 28, 2009 5:58 am 
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treeman3x673miv wrote:
.
Another question does the PCM wait until the engine is warm until it starts monitering the engine?(I was told this by a friend)


The PCM runs in "open loop" until the oxygen sensors heat up. "Open loop" is a pre-programmed operation schedule for running the engine without oxygen sensor inputs. Once the oxygen sensors heat up, the PCM runs in engine in "closed loop", optimizing the air/fuel ratio.

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And the people bowed and prayed to the neon god they made.
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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Sat Feb 28, 2009 8:44 am 
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When I replaced the coolant temp sensor ( hoping that was the problem) I bought it for $24 at autozone.

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Sat Feb 28, 2009 10:43 pm 
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i just had the same problem on my sisters 96 it was the crank sensor that was fun to get out :negative: oh yea forgot about the coolant temp sensor it was new also crank sensor was the culprit there

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Last edited by rdhzrd62902 on Sun Mar 01, 2009 5:40 am, edited 1 time in total.

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Sun Mar 01, 2009 4:56 am 
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Did you check or replace the Coolant Temp Sensor yet?

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Sun Mar 01, 2009 2:19 pm 
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No I havent checked the coolant temp sensor yet I pulled the wiring harness and have been checking the wiring to make sure every thing is good there,so far it all looks good.
Next I will replace temp sensor then crank sensor.


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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Mon Mar 02, 2009 2:53 pm 
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I fixed the same problem on the '95 with a new Crank Position Sensor.

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 Post subject: Re: 96 neon dies when gets to operating temp HELP
PostPosted: Thu Mar 26, 2009 5:09 pm 
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Thanks everyone it was the crank sensor.


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