Tonight I tested my knock sensors because I was getting some false knock and timing retard at idle, based on datamaster scans I did yesterday. This is in a 94 Corvette that I just finished doing a LE2 H/C swap. The knock sensors were brand new from GMPP when I put the motor back together and I also installed the LT4 knock module in the PCM for good measure since I installed 1.6 roller rockers too.

Tonight I tested them as instructed on Shoebox's website.

I got voltage readings of 4.8 on both wires going to the sensors, but the wires are pretty fugged up, so I think I'm going to be replacing the connectors and wires this weekend.

I then turned off the key and ohmed out the sensors and I got 99.6k ohms on both sensors. Does this indicate that they are the wrong sensor for my 94 OBDI PCM? I think the test procedure said the OBDII cars used the higher resistance sensor?

Any comments welcome

Thanks in advance

 

FOR POSTERITY

I have undisputed proof that I installed the wrong knock sensors and pulled the code 43 for having them wrong sensors.


I went to my account at GM parts direct and see that I ordered the wrong sensors. Anyone need OBDII sensors? I got two you can get real cheap. I hope I can find the correct ones around here tomorow.