I should add.. If your skeptical, just find a 300zx with a working detonation sensor. Plug in your datascan to check no codes. Get the engine running to normal temp. Get a hammer and start pinging the engine. Give it a good tap to trip the sensor and watch the timing with a timing light. You will see it retard in response to the "pinging". Now recheck your error codes. You wont find any.
Cant miss it Its on the top metal water pipe behind the fan. Cant remember off the top of my head if its the left or right but feel free to clean both.
Nathan, so when functioning well, the det sensor on picking up detonation does what?? Puts the car into safety boost but gives no fault code? And why are you able to clear the code under specific circumstances and not clear it under others?? I hope Im not sounding disbelieving of what you are saying, I just need to understand these things, and well!(its my work) And I thought I had a pretty good grasp on the det sensor one.
ok. Because... i have guages connected i just read off them. But if the orriginal sensor is dodgy that will come up and foul up the car?
Im south of Sydney, at Thirroul. I can show you the sensor and I have the tiny cleaning files and connector cleaner. Im pretty flexible time wise, most days or evenings.(except this wednesday) My Zed has the bypass, so you can see what its about.
Correct No fault code on detonation. As I said before, you've likely got one partially getting proper contact at times. Have a read of the "I should add" post, cause I knew you'd be sceptical. Its a very very common misconception about the ECU codes but completely wrong. Grab a timing light and test it out for yourself.
Code 34 means ---> the ECU has seen "an abnormally high or low voltage" from the DET Sensor Circuit. Usually caused by either the DET sensor malfunctioning or the sensor harness/loom having one or both plugs corroded. Most of us bypass the sensor with a 1Mohm resistor until we next have the plenum off to replace the faulty parts. As Nathan said, detonation will not throw code 34.
Code 34 will not clear --> if the ECU can still see "an abnormally high or low voltage" from the DET Sensor Circuit, ie the circuit is constantly faulty. Sometimes the fault is intermittant and can be cleared.
my car did that a while back... it was traced to a fault in the wiring. New wiring, problem solved. Cheers
Stick the resistor up your ...... With Det Sensor to ECU plug disconnected, determine which side goes to ECU, (usually the female connector), insert the resistor into female receptacles so as to bridge the connection. Ensure a tight fit & use insulating tape to hold in place.
so if i bypass this sensor then... my engine will die if it ever has a detonation cause the snsor wont pick it up. Im not sure its such a good idea. How many people do this?¿
i think the det sensor is shit anyway.... it works in too narrow and too short an rpm range and did absolutely nothing for me when my engine was pinging its tits off. Cheers
