LiftedGmc355
207 Stepside
- Joined
- Sep 14, 2011
- Messages
- 558
- Reaction score
- 3
so i just did a motor swap in my 89 gmc i pulled out the stock tbi 305 and replaced it with a tbi 350 out of a 95 gmc. i never pulled the distributor out of the new motor and it was pulled out running just fine. i put the new motor in and swapped over all the wiring, knock sensor and throttle body from the 305 to the 350. the issue is that it sounds like its 180 degrees off timing. ive heard i need a new computer?? any help would be greatly apreciated. the truck is a base model 5 speed 4x4 if it makes any difference thanks