TBI Fuel pressure

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06-18-2004, 07:35 PM

90_WS6_Formula

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Car: 91 Z28

Engine: L98

Transmission: 700R4

TBI Fuel pressure

I checked my fuel pressure on the outlet side of the fuel filter and I got 12psi. Is this OK or a little weak?

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06-18-2004, 10:20 PM

25THRSS

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Perfectly fine. It doesn't seem that the factory had a "set" pressure, but they range from 9-13 psi I believe. 12 is pretty good.

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06-19-2004, 01:53 PM

90_WS6_Formula

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Car: 91 Z28

Engine: L98

Transmission: 700R4

I'm assuming this is the factory fuel pump?

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06-20-2004, 12:48 PM

ShiftyCapone

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Car: '90 RS

Engine: 377 LSX

Transmission: Magnum T56

Quote:

Originally posted by 90_WS6_Formula
I'm assuming this is the factory fuel pump?

Yup that is the stock pump and it is running fine. An aftermarket pump will be much higher and upwards of 22 to 70 psi.

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