I'm helping a friend do a TPI swap to his 1991 RS. It currently has the stock 305 throttle body motor. He has a complete tuned-port setup from an 89 IROC (which is MASS air). If he uses the (non-speed air ECM and ECU), will his 1991 (factory) guages work? Or, will he have to use a speed density TPI setup and a 1991-1992 Z-28 ECM? Any other problems to look out for? Any help would be GREATLY appreciated!!

Thanks again guys!!

Mike

 

You'd probably get a better response on the Tech or TPI forums.

There are doctors available to treat your condition...

 

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I just swaped one in to my car all i had add/change a few wires to the c100 connector (engine side)

added a ground wire to C7 of c100
(usage vats gages etc)

added a ground wire to F8 of c100
(usage sir)

connected pin f on the alternator to G8 of c100
(car wouldnt charge without it)

add vss wires to E4 and D4 of c100

removed orande wire (under hood light) from interior harness side (c207 connector pin m) located under dash next to computer. The 89 wiring harness has a ground going to that location and kept causing my accesory fuse to blow as far as i could tell the 89 wiring harness has no under hood light