89 TBI same as '91? Also L05 swap PROM question I picked up a 91 RS today, I have a Helms for my '89, is the '91 TBI the same setup as the '89? Also, what year Caprice prom do I need for an LO5 swap? Car has a LO5 crate engine in it, but is running on the LO3 PROM. Car's got some balls too. Thanks |
My first f-bod was an 89 and now I have a 91 and there is not too many differances. As far a the LO5 prom I used one from an 89 and a 90 when I had a 350 in mine and could not tell the differance. When the 350 goes back in though I will use a modded 305 5 speed calibration to start with. |
From an 89 or 90 9C1 sedan (with VIN code 7) only. The 91-93 9C1 with LO5 used a different ECM. |
In 91' they switched to a different style throttle position sensor. |
Cool deal, thanks gent's...so 89/90 is what I'll look for in the PROM. |
id go with a 89 chip ;) |
Originally posted by BPA id go with a 89 chip ;) I'll send you an email of my findings...think I'm getting it close, spent a few hours on it yesterday, replaced the O2 sensor (fouled) backed off the fuel pressure some, and now I can get O2 crosscounts working (in idle) all the way up to 3000RPMs...check you hotmail account. |
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