What fuel pressure(s) should I read on the little guage on my fpr
01-26-07, 06:34 PM
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What fuel pressure(s) should I read on the little guage on my fpr
89 n/a... The entire fuel system under the hood except for the injectors is aftermarket... I just finished (finally) everything... I went to go get my car inspected since it expired while my car sat in the garage and the guy says my car is running extremely clean... I figure this was probably not a good thing if not totally unnatural... It didn't even blow its little puff of smoke out when I started it and it used to...
So... What fuel pressure(s) should I read on the little guage on my fpr, say at idle...?
Is there any specific rpm ranges I should check it at? If so what pressure should I read at those RPM ranges...
This would be the first fuel system I have ever installed... Please dont let me fry my motor...
Thank you,
Randal
So... What fuel pressure(s) should I read on the little guage on my fpr, say at idle...?
Is there any specific rpm ranges I should check it at? If so what pressure should I read at those RPM ranges...
This would be the first fuel system I have ever installed... Please dont let me fry my motor...
Thank you,
Randal
01-26-07, 08:01 PM
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Originally Posted by HAILERS
I'm surprised SOMEHOW you missed the figures in the free, online FSM. The Fuel Section.
I checked it and it gives the pressure at the fpr being 18 psi at idle... My car died when I tried to set it that low... It also shows what it should be at the pump... I am asking what the guage on my aftermarket (NOT COVERD IN THE FSM) fpr...
01-26-07, 10:26 PM
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Go read it again, it does not say 18psi at idle. All the info you need is right there from page F1-50 to F1-54. The fact that you have an aftermarket FPR is irrelevant.
Why are you putting one on an NA anyway?
Why are you putting one on an NA anyway?
01-26-07, 11:47 PM
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Originally Posted by NZConvertible
Go read it again, it does not say 18psi at idle. All the info you need is right there from page F1-50 to F1-54. The fact that you have an aftermarket FPR is irrelevant.
Why are you putting one on an NA anyway?
Why are you putting one on an NA anyway?
01-27-07, 09:11 AM
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IF the pump is running with the engine off (fuel pump check connector jumpered), then it will read about 37-39 psi.
That's about the same figure you'll see when your driving and floor the pedal and the intake manifold pressure hits atmospheric pressure or zero if you will. From there on as you boost it'll be one more fuel psi over the 37-39psi for every psi of boost.
IF the engine is at idle (approx 750rpm) the pressure will be 28-32 psi, depending on the health of the engine. More vacuum at idle, the closer to 28psi you'll get. A higher idle than 750rpm will result in a pressure closer to the 28psi than the 32psi.
That's about the same figure you'll see when your driving and floor the pedal and the intake manifold pressure hits atmospheric pressure or zero if you will. From there on as you boost it'll be one more fuel psi over the 37-39psi for every psi of boost.
IF the engine is at idle (approx 750rpm) the pressure will be 28-32 psi, depending on the health of the engine. More vacuum at idle, the closer to 28psi you'll get. A higher idle than 750rpm will result in a pressure closer to the 28psi than the 32psi.
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