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Discussion Starter #1
Working on a 97 obs w 7.3, the problem is it runs for 1/2 hr then dies sometimes it will start right back up and others it wont. We replaced 2 cam sensors still didnt fix it. It acts like you turn the key off, checked all codes none. Just wondering if it could be a junk ECM? The truck has 200,000+ miles on it , its a service truck. Also cheked around local parts stores and dealer ships & no one can get a ECM, any ideas were to get one if thats what it is?:dunno:
 

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BIG TRUCK, SMALL DRIVER
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Have you watched the fuel pressure while it is running? How long has it been since the last oil change? Does it cut off when driving and idling the same? Sorry for so many questions.
 

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Discussion Starter #3
Fuel pressure is ok, engine dies while driving. Seem like when it dies its like you shut the key off, dont bog down like loosing fuel pressure.
 

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mine did the same thing, it ended up being the cam sensor and fuel filter housing leak otherwise air. i put like 2 or 3 sensors on mine too.But the air in the system fixed it.
 
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