fuel pressure

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May 26, 2010 | 12:50 PM

matt1970pon

Thread Starter

Junior Member

Joined: Feb 2010

Posts: 94

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Car: 1987 iroc z

Engine: 305 tpi

Transmission: MM5

Axle/Gears: 3.45 g92

fuel pressure

I just check my fuel pressure on a 305 TPI motor. at start up it pegged the needle at 45lb plus. I thought TPI cars ran around 30-35psi.Am I right? If so my fuel reg. needs to be replaced. I have a rough idle and a fuelly smell exhaust.Can some confirm this?Thanks

May 26, 2010 | 10:36 PM

ty001

Junior Member

Joined: May 2010

Posts: 30

Likes: 0

From: Back Woods of Indiana

Car: 91 Camaro

Engine: 3.1

Transmission: 700r4

Re: fuel pressure

100% stock tbi engines enjoy 13-13.5psi and those with some modifications enjoy 14-14.25psi.

May 27, 2010 | 06:49 AM

matt1970pon

Thread Starter

Junior Member

Joined: Feb 2010

Posts: 94

Likes: 0

Car: 1987 iroc z

Engine: 305 tpi

Transmission: MM5

Axle/Gears: 3.45 g92

Re: fuel pressure

ok but its a tuned port motor..TPI..I was told anything over 47psi reg. is bad.That is a constant pressure. Apon start up it could hit that then drop to mid 30's.