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What can cause the fuel pressure to go down when accelerating?

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Old 10-10-2002, 11:23 PM
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What can cause the fuel pressure to go down when accelerating?
Whats up everyone?
I have a problem with my fuel pressure going down while reving the engine at idle! Any ideas on what would cause this?
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Old 10-11-2002, 02:14 AM
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Car: Tahoe
Engine: 350
Transmission: T56
yeah, the injectors are letting off the built up pressure when you rev your engine
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Old 10-11-2002, 02:18 AM
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How many PSI is it dropping? In my chilton it says a 8-10psi drop during accelleration is normal. but it could be a weak fuel pump, or dirty fuel filter.
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Old 10-11-2002, 08:08 PM
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Its dropping down in the 25-30 lbs range. When it goes down in the 25lbs range the motor starts to run rough. The rough running motor starts at aroung 3000 rpm & continues all the way to redline. I have another post that goes into this further, please read !!
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Old 10-12-2002, 12:18 AM
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sounds like fuel pump. Make sure your gauge isnt to blame first though.

Better not hit WOT for a while
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