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tpi cold start problems
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Posted by: db25

Hi eveyone I am new here and have a ? about my 91 z28.
on a cold start it will turn over for a while before starting .
When it does start it runs fine and if I turn it off it will start right back up.
Any help would be great.

Posted by: StoneFox

Do those TPI systems have a cold start injector?

Posted by: db25

not really sure.

Posted by: GMR

The 85-88 Fcars used a cold start injector. The rest after that used the other injectors for cold start. Try checking your fuel pressure or TPS sensor somtimes they get misaligned.

LS

Posted by: db25

what should the fuel pressure be?

Posted by: Giz

55 I think I have set most of the ones I have played with between 57 & 65
but GMR woke me up and reminded me that stock was up to 47psi
I am running undersized injecters in oversized motors

Giz

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