Engine Performance problem
2000 Cadillac STS V8 Front Wheel Drive Automatic 90000 miles
Hi I bought my wife a 2000 Seville STS about a year ago. It has had some minor problems, but other than a starter, nothing too costly. Lately it has had an intermittant problem of running very rough, with low power as if there were water, or other contamination in the fuel. The problem then clears up, then returns. I pulled the plugs and they were clean, the exhaust smells rich when it is running poorly. I had a guy check the fuel injectors, and he said they were fine, but that the voltage reading to the injectors was higher than expected. We also have some electrical anomalies in which the CEL, Brake, and other lights will come on and go off, and the occasional "Stability System Needs Servicing" warning light and gong will come and go as well. It seems that there should be some unifying electrical issue that is causing all of this. The car is essentially undrivable today as it stands now, but I may get home from work and have it drive fine. Any suggestions other than trading it in when it is running okay? I am concerned that it may not run good again as it seems to have fewer good days. Any suggestions would be appreciated. Here are the codes I was able to get from the OBC.
ABS: C1287, U1000
PCM: P0300, P0420, P0741, P1106, P1860
TTM: BC1983, U1016, B1009, B2739
have the same problem?
Monday, December 7th, 2009 AT 4:11 PM