Strange Issue - Diesel Truck Forum -
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post #1 of 2 (permalink) Old 06-18-2010, 02:19 PM Thread Starter
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Strange Issue

Im working on a late 99 7.3l at work. It came in as a no start, or start then die in a few min and wont start back up. It has two ICP codes. 1211 and 1212. the owner tried a new ICP sensor, same problem. The oil is clean and full. It got towed in and it started right up. Ran perfect, very responsive and could spin the tires brake boosting it. I let it run for about 25 min. I shut it off and tried restarting agian. started up, but had a extended crank and ran very poorly. No power, very sluggish and would think about spinning the tires brake boosting it. I shut it off again, no start. I took the IPR valve out and cleaned it. Started up and ran good again. Shut it off, no start again? WTF? I think there is something wrong with the IPR valve.

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post #2 of 2 (permalink) Old 06-18-2010, 10:32 PM
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i would prolly say itd be safe to change the ipr valve.. and if that doesnt fix it pull the covers and check for oil leaking past the orings.. when it wont fire hook a scan tool up and check icp during cranking.. wont fire unless it sees atleast 400psi
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