Loss of fuel pressure under wot?????? - Ford Powerstroke Diesel Forum
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Old 07-24-2012, 08:49 AM
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Loss of fuel pressure under wot??????

i have a 2001 ford 7.3L with a ts chip on it loaded with tonywild man tunes. I am loosing fuel pressure under wot on the extreme tune(down to 15lbs) is this a sign of a weak fuel pump or could it be in my return spring? i have a 70lb spring in my truck.
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Old 07-30-2012, 11:47 AM
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Old 08-15-2012, 07:44 AM
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fuel pressure is usually going to drop a little under WOT, but should not go below 45 PSI. Unless your pouring *** loads of fuel into it theres an issue with the pump or filters that are clogged preventing flow.
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Old 10-09-2012, 11:00 AM
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Did you figure anything out? My 95 is doing the same thing.
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fuel, fuel pressure, fuel pressure spring, fuel pump

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