loss of fuel pressure at high rpm

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10-08-2003, 08:12 AM

96SS232

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Join Date: Apr 2002

Location: Herndon, Va, 20170

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loss of fuel pressure at high rpm

I have a miss at high rpm, 4000 and up. I thought it was the opti, but i hooked a fuel pressure gauge up last night and drove it, and I found that my fuel pressure was dropping to 35-38 at WOT, and sometimes would drop to zero for split seconds at a time. Any ideas?

10-08-2003, 08:15 AM

96SS232

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Location: Herndon, Va, 20170

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BTW, i disconnected the vacuum line on the regulator and drove it, and it didnt get any better.

10-08-2003, 08:57 AM

IDOXLR8

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Location: Rochester Hills, MI

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It sound like your problem maybe a bad fuel pump.

Whenever there is a drop in fp like that it is most likely due to a bad fuel pump.

10-08-2003, 09:00 AM

WheelmanZ28

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Location: Chicagoland Area

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I agree

The most noticeable sign of a bad fuel pump is inefficient flow at RPMs, and WOT. I would highly suggest u replace it ASAP before it goes out completely on u.

10-09-2003, 09:09 AM

96SS232

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Location: Herndon, Va, 20170

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any suggestions on a good pump and where to get one?

10-09-2003, 09:20 AM

IDOXLR8

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Location: Rochester Hills, MI

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If you do not plan on doing any internal upgrades to your car then you can get away with going with a Walbro 195 lph. If you plan on doing heads and cam then I would recommend going with a 255 lph intank pump. You may want to try and contact Jack at Racetronix.