injectors again

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Aug 29, 2006 | 11:47 PM

rcr103

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Instructor

Joined: Jan 2005

Posts: 145

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From: Ft.Worth Texas

injectors again

OK I know this is getting old ,but what should the fuel preasure be set to on a 91 with the ford 24# injectors.I think mine is running just a tad rich.Thanks for any help.
Randall

Aug 30, 2006 | 07:30 AM

RRT vette

Le Mans Master

Joined: Feb 2006

Posts: 8,753

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From: Louisiana

Only your tuner would know the exact number. I would just be guessing.

Aug 30, 2006 | 07:43 AM

edcmat-l1

Melting Slicks

Joined: Jul 2006

Posts: 3,356

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From: Chesapeake Va

Quote:

Originally Posted by rcr103

OK I know this is getting old ,but what should the fuel preasure be set to on a 91 with the ford 24# injectors.I think mine is running just a tad rich.Thanks for any help.
Randall

If its running a tad "rich" the computer will compensate for it. If you have access to a scanner you can see this by the fuel trim #s. On your car they would be block learn and integrator. These are long term and short term fuel trim. Idealy they would both be very close to 128. if its running on the rich side the computer will pull out fuel, lowering the #s until it likes what it sees from the 02 sensor. If the computer hasnt been programmed for the larger injectors, you will most likely have to turn down the pressure until the fuel trim #s come back to "center", or roughly 128. BUT, when you program the new injector size in you'll have to reset it again to get the #s back. hope this helps

Last edited by edcmat-l1; Aug 30, 2006 at 07:46 AM.

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