ghoastrider1

do 91/92 runners of a trans am TPI interchange? thanks.

vetteoz

With what ????????

MrWillys

All TPI runners will interchange. However, 89 thru 92 will not have provisions for the cold start injector if used on 85 thru 88 systems.

ghoastrider1

thank you sir.

UNCLEBILL

Accel used to have a 9th injector delete kit. A plug for the injector and a cap for the fuel rail. Did this to my 1988 Formula 350 Firebird (sons car now). Never found it a problem deleting the 9th injector.
Bill

Baller

Also check the EGR. I replaced my 90 tubes with Accells street runners for an 88-89 and they had EGR connections on both sides so I had to plug the drivers side to stop a huge vacuum leak. 990 Runners don't have a drivers side EGR tube.

1988


1990

vetteoz

Nope.

The drivers side tube is the IAC feed direct into the TPI base for the cold start injector used on the early cars as mentioned above

'89+ runners; no CSI so no drv side tube

Baller

In either case if you don't have the matching plenum from the same year you can get one huge vacuum leak. So OP, check to make sure the plenum matches the runners because there is a difference between years. In my case it was easy enough to just plug the tube and seal it.