2006 Cadillac DTS Q&A
2006 Cadillac DTS Question: can the oil pump cause the valves to stay open,causing a misfire
I am getting a misfire,and the coil packs,injecters and computer have been checked,also cam and crank sensers,The guy looking at it says #2 exaust valves are staying open causing miffire And thinks oil pump has to much pressure causing valve to stay open.Does this sound right - J.T.
i would think if one is open from oil pressure, then all should be open and it would not run. i would start with a compression test, both wet and dry. compression will verify his results. Roy - mastertech6371
Cylinder leakage test would also be a valid test but of course is done static (engine off). We used to do what was called a running compression test years ago looking for bad cam lobes, it would be a good test too. - patrick mannion