[DML] Engine Misfires / Won't Start Cold
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[DML] Engine Misfires / Won't Start Cold


I am hoping someone could help me troubleshoot an issue I am having 
with my car.

My engine misfired the other day after the car had been running for > 
2 hours. (Air temperature has been in the 90's since this has been 
happening, whether or not that's a factor, I don't know).  This 
happened once before, with similar weather conditions.  Anyway, since 
this happened, my car will not start cold.  It will turn, but no 
ignition. I am only able to start it by removing the air filter box 
and pressing / opening the pressure plate on the MCU. It seems to 
work best if someone else starts the car while I apply slight 
pressure on the plate.  It will then run rough for about 30 seconds 
and then runs smooth (about the time the ISM valve closes).  Once the 
car warms for a few minutes, it will start each subsequent time and 
runs well.  

I have new plugs and cables.  I have pulled the Primary Pressure 
Regulator to ensure the seals are good.  I also have positive fuel 
pressure.  The entire fuel system was replaced by the previous owner 
a few years back.

Does anyone have any idea that can help point me to the culprit?


Chad Hall 
Nashville, TN


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