can a bad knock sensor cause your rpm to tweak up and down when the car is warm up.

 

nope, when the ecu can't find the knock sensor you will get a code + the ecu goes into safe mode, running rich and with less advanced timing and fuel maps

idling can easily go out of tune becuase: a IAC (rear of the manifold) and sticking plate on the TB, MAP sensor, 02 sensor and vacumm leaks, other thing to check are coolant level and air bubbles..

 

knock sensor is still trippen. first i thought that the knock sensor was bad so i purchase a 94 ls. that wasnt the problem. i adjusted my distrubutor cap back to normal and still that was nt the problem. there are three sensors on the back of the motor two of them has single wires and one has 2 wires which is which. now with this out of mind what next can i do to find this problem. please help