Replaced coils, housing, boots, plugs, crankcase position sensor, etc, and still not working. We have a '93 Grand Am, 2.3L SOHC, that is not passing emissions testing. We replaced the O2 sensor, per the error code on the diagnostic machine. Still had problems. We asked a neighbor who is a mechanic what the problem could be and he suggested replacing the coils, which we did. Still had the problem. We took it to the dealer who diagnosed it as bad coils/coil housing/boots. We replaced the coils again as well as the housing and boots, plus did an entire tune-up. It ran fine for about 30 minutes and then the problem came back. We took it in again to a State inspector who again diagnosed the coils. Again, we replaced the coils. Same problem. The inspector ran a full compression test and everything came back good. The motor itself is fully in spec. The inspector called his supervisor who said that maybe it was the crankcase position sensor, which we just replaced and still have the same problem. Supposedly there isn't a strong enough current being sent to the ignition coils. Does anyone know what in the world could be the problem. We have spent way too much time and money on this car only to be told the same things over and over. I'm definitely pulling my hair out and would appreciate any help I can get. Thanks!
Thursday, August 23rd, 2012 AT 12:14 AM