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Rat Motor

GM production big block engines were known as Rat motors.

'W' Series:

5.7L 348ci - 1958 thru 1964
6.7L 409ci - 1961 thru 1965
7.0L 427ci (Z11...

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Re: Acceleration trouble

Subject: Re: Acceleration trouble
by anesthes on 2008/9/21 17:50:32

Quote:

jimmers wrote:
Ok well I've been playing around all day so far and heres what I found.
I start the car the fuel pressure goes up to about 45psi, then dies.

The fuel pressure dies or the car dies?

Quote:

jimmers wrote:
The fuel pressure goes down to 0. Once it dies the fuel pressure goes back up to about 45psi and I can start it again. So it's completely loosing fuel. When I turn the ignition to on the fuel pressure stay's steady at 45psi and slowly goes down. That makes me beleive that my injectors are fine and not leaking. Could it be the FPR, or a vacuum problem?

I think your pump is failing. I think it can prime to 45psi but cannot maintain, but I also don't completly understand what you are describing.

How long does it take to fall when you prime it? (key on)?

My TPIS AFPR would hold pressure for about 2 weeks. My holley regulator holds it for about 2 minutes. heh.

-- Joe

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