Discussion Starter · #1 ·
Just installed a tbi 305 in my 89 astro. Broke in the cam as required. However, first trip down the road was not so good. This thing seemed to run good in the driveway but going down the road it popped, farted and limped its way up to 45 mph. I have used all the original sensors from the 4.3 tbi. I have gotten conflicting answers on what sensors would swap over to the v8. I did replace the ECM with the correct year and equipment. Does anyone know for sure what sensors really will work on the 305. It seems like the engine retards itself when I get a load on it. Once its up to 45 mph and I let off on the gas it seems to smooth out. Any help would be greatly appreciated as my wife is getting upset with the amount of time I am currently spendy with "the van".