I have a 1997 gmc sierra 4x4 with a 350 vortec, I recently put a 1996 chevy suburban 350 vortec in it but now it idles rough and is running really rich and is getting horrible gas mileage, I had it pluged into the computer and several codes popped up, could the computer not be correct for a 96 model engine?
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engine swap 1997 sierra with a 1996 suburban engine
- Thread starter raydes84
- Start date
happy 2011
New member
What codes do you have. You used the same computer that was in your tk right?
Yes it the same computer that was on the truck. The first time it was plugged in it said #1 fuel injector was bad so I replaced it and there was no change so I got it plugged in again(on a differant computer reader) and it said throttle possition sensor, multiple misfire, and several oxygen sensors and the guy that plugged it in said the computer may be differant.