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Galvez83

08-17-2022 09:31 PM

5.0 to 5.7 swap TBI Injectors

I just recently did a swap from a 5.0GI PEFS TBI to 5.7 Volvo Penta the question i ask is, is there a need to change injectors after the ECM has been reprogrammed. I used the old injectors. I am having issues with rpms and backfiring and i want to at least get my mind of, do i or don't i. Fuel pump test shows low at 18psi constant and high at 33 constant. Please advice

SB	08-17-2022 10:52 PM

You’ll need to double check parts listings, but i believe the volvo penta uses same injectors for 5.0 and 5.7’s with throttle body injection.

1BIGJIM

08-18-2022 07:29 PM

I have Volvo’s in my Cobalt. It is the same injectors. Why would you need to reprogram going from 5.0 to 5.7? That is I would be looking. Hook a computer up they don’t lie.

SB	08-18-2022 07:34 PM

Quote:

Originally Posted by 1BIGJIM (Post 4842019)

I have Volvo’s in my Cobalt. It is the same injectors. Why would you need to reprogram going from 5.0 to 5.7? That is I would be looking. Hook a computer up they don’t lie.

45cid is a lot more air. Air the computer has no idea has been added. Programming will be necessary.

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