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- - A.I.R. Injection on TBI 454 (https://67-72chevytrucks.com/vboard/showthread.php?t=512245)

A.I.R. Injection on TBI 454

What year did GM stop using A.I.R. injection on the TBI engines? I just picked up a '90 C2500 Suburban w/ a TBI 454 for the engine/trans and I noticed it didn't have it.

Re: A.I.R. Injection on TBI 454

I have Never seen Air Injection on any TBI engine , I have two 87's (first year for fuel injection) with TBI , that don't' have it.

Desert

Re: A.I.R. Injection on TBI 454

Quote:

Originally Posted by Desert1957 (Post 5229086)

I have Never seen Air Injection on any TBI engine , I have two 87's (first year for fuel injection) with TBI , that don't' have it.

Desert

Sir - you probably have Federal Emission Certified trucks. The '87 SBC (305/350) were equipped with AIR for CA certified light duty trucks. Seen a few of them at JY. However, in grand scheme of things AIR is not needed on EFI trucks - it is only used during cold start to bring CAT up to temperature depending on ECM calibration. The rest of the time it is not used (except perhaps during WOT, which I have yet to see). Things can be very strange here in Kalifornia!

//RF

Re: A.I.R. Injection on TBI 454

Quote:

Originally Posted by rfmaster (Post 5229389)

Things can be very strange here in Kalifornia!

//RF

You said it.