Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, 2003 CTS Starting and engine issue in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Hi, I have a 2003 CTS and it worked great until recently. I went to start it one day and ...
Hi, I have a 2003 CTS and it worked great until recently. I went to start it one day and it started really rough and ran with a knocking sound. I shut it off and now when I try to start it I have an extended crank until it starts and the knocking persists. I have had the valve covers off and the mechanic said that the valves look fine and he would have to guess at what is wrong. Does any one know what this might be? I was told that replacing the entire engine would be the best choice but I would rather not do that. Does anyone know what happens if the camshaft position sensor is bad?
That is what I was thinking, are they hard to do? Also is it possible that a timing belt malfunction cause this?
thanks for your help
I wouldn't say it's hard but if you have big hands at all then it could be tricky. You have to snake your arm around the catalytic converter and feel for the bolt. You won't be able to see it. As for the timing belt, if it skipped a tooth your engine would probably be toast and not run at all. Cost me $50 for the part, $10 for a 6 pack of beer and an hour and a half of my time. Could probably do it in 30 minutes now though.
I wouldn't say crankshaft position sensor. That wouldn't cause knocking, knocking is cause by either lack of lubrication, detonation or timing being off. I would start by taking the timing cover off and lining up marks. I'd put my money there.