I have a 2000 Chevrolet Corvette with just over 87,000 miles, manual, OBDII codes P0327 and P0332. My car was fine till my oil pressure gauge read max (80 psi) whenever the engine was running. I determined that I needed to replace the oil pressure sender. Since I had to remove the intake manifold to replace the oil pressure sender and intake manifold gasket set, I felt it would be wise to also replace the camshaft position sensor, both knock sensors, and the knock sensor wiring harness while the intake manifold was off. I used all new GM/AC Delco parts. I got it all back together and it started right up, and the oil pressure gauge read normal, yeah! After driving around 50 miles, my check engine light came on. OBDII codes are P0327 and P0332, knock sensor circuit low input, reduced engine power. I cleared the codes and after driving approximately 50 miles, the check engine light came on again. Tried this two more times with the same result. I took it to two different mechanics in different towns, and neither mechanic could find anything wrong. I was told by both if the wiring harness wasn't connected properly, the check engine light would come on immediately, and the chances of me getting one new faulty AC/Delco knock sensor would be like hitting the lottery. Two new faulty knock sensors are nearly impossible.
Any idea as to what could be causing this problem? Should I take it to an authorized Chevrolet dealer? HELP!
It's more than likely the dealership won't be any more helpful than the two mechanics that you've dealt with already.
Hunting for a good diagnostician is a lot like sussing out MDs (both primary care and specialists). Sometimes, one has to go through several (four, five, six) before you find one who actually knows how to diagnosis and treat the condition that your dealing with.
The key is to find a diagnostician who GUARANTEES the fix (based on their diagnosis) and will do the proper testing and diagnosis first, before discussing any fix.
What you don't want are people who "fire the parts cannon." Most of the time, there's changing of good parts for substandard ones, and often, the problems multiply, because the substandard parts create new problems.
I don't buy their line about "Two new faulty knock sensors are nearly impossible." Do you still have the old knock sensors? Those were working before you replaced them. Put them back and see if the codes clear and stays clear.
