7.3 cranks for 30-40 secs before finally starting - Ford Powerstroke Diesel Forum
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Old 04-03-2011, 03:02 PM
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7.3 cranks for 30-40 secs before finally starting

I have a 97 7.3 that cranks for 30-40 seconds before it will fire up. Once running if I shut it off it will crank for 30-40 seconds again. This truck sits most of the time and it has 150k on the motor. The oil is new and it has nothing to do with temperature. It cranks the same whether it's -20 or 70 degrees out. I had it scanned and there are no codes and the buzz test is good. I am thinking it's the HPOP starting to go. Anyone have any suggestions?
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Old 04-03-2011, 03:32 PM
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If you could watch the ICP while cranking, you would see if the pressure was taking a while to build up, to the 500PSI required. A good scan tool, capable of seeing the data stream would let you see the ICP sensor pressure.
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Old 04-03-2011, 04:13 PM
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Also monitor your cranking speed. Should be around 150 to 180 rpm.
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Old 04-03-2011, 06:39 PM
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Quote:
Originally Posted by cyrus3355 View Post
I have a 97 7.3 that cranks for 30-40 seconds before it will fire up. Once running if I shut it off it will crank for 30-40 seconds again. This truck sits most of the time and it has 150k on the motor. The oil is new and it has nothing to do with temperature. It cranks the same whether it's -20 or 70 degrees out. I had it scanned and there are no codes and the buzz test is good. I am thinking it's the HPOP starting to go. Anyone have any suggestions?
i would check icp,ipr but you are probably right about hpop.
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