Misfire need help - Diesel Forum - TheDieselStop.com
Power Strokes 1994-1997 General Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.

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post #1 of 3 (permalink) Old 11-21-2012, 05:31 AM Thread Starter
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Misfire need help

I have a misfire on a t444e. The truck starts acting up after it has been warmed up and ran for a bit. It does not happen at any specific rpm or under load, it just gets progressively worse as you drive. Sometimes will even stall. I changed the fuel pump and filters, but that did not help one bit. Any suggestions?
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post #2 of 3 (permalink) Old 11-21-2012, 09:26 AM
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You may have a bad O-ring on the HPR or have a weak HPOP. When the engine warms the oil gets thinner and can sneek past a weak O-ring.

Plug into it with a diagnostic tool or laptop with software and look at the IPC pressure it may be dropping off

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post #3 of 3 (permalink) Old 11-21-2012, 01:24 PM Thread Starter
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Misfire need help

Thanks paul. I will take a look. I will keep you posted!
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