The only problem was that the oil pressure gauge was always reading maximum when the engine was running. I removed the intake manifold to replace the oil pressure sensor and while I had it apart, I thought it might be smart to replace the camshaft position sensor, both knock sensors, knock sensor wiring harness, and of course the manifold gasket set. I used all new GM/AC Delco parts. I put silicone sealant around the two knock sensors. Got it all back together and the engine started right up and sounded good. After 100 miles or so. the check engine light came on, giving the P0327 and P0332 error codes. I cannot see anything wrong under the hood during a visual inspection. I cleared the codes, but the check engine light came back on after driving approximately 60 miles, showing the same error codes. I don't hear a knock and I find it hard to believe that I bought two NEW AC/Delco knock sensors that are both defective. I would appreciate any input from anyone who might have a clue as to what is wrong before I take the manifold off again. Thank you!

 

It's highly possible that you have a bad harness, or even a bad engine/ computer ground. Hopefully someone with a little more electrical experience will chime in. Otherwise it could be time for a professional diagnostic.

 

Thank you for your response.