1990 Cadillac DeVille Q&A
1990 Cadillac DeVille Question: CAR RUNS REALLY ROUGH/ SKIPS MISSES/WANT SMOOTH OUT AT ALL WHAT CAN I DO NOW?
stop with all the parts replacing and go back to basics. you need to do a compression check to verify the motors ability to work well. you need to do a vacuum test and test for vacuum leaks as well. you need to find the reason before replacing parts. Roy - mastertech6371