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How long should an EFI system maintain fuel pressure?

broncomitch

Bronco Guru
Joined
Jan 17, 2008
Messages
2,384
Loc.
west jordan, utah
I haven't seen a spec on the time but I believe it should maintain some pressure for at least a couple hours. 10 psi after 9 hours sounds real good. Time to chase the spark.

My fuel pressure drops right when I shut the motor off..

But turn the key back on it shoots back up to 43psi and holds there wile running..

Sometimes take 1 or 2 tries before she will stay running...
 
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