Re: Camshaft and Crankshaft Position Sensors
I checked out the sensor, and it appears to be fine. It is indeed the 1999 style from the original engine. It had "2410 1510" on it, which I cannot find anywhere online as a part number, but the construction style, the fact that the sensor itself is magnetic, and the voltage output it reads all confirm it is a reluctor style sensor.
I conducted some more poking around, and found the following: The crankshaft position sensor code is rarely thrown, and perhaps is in response to the car running very poorly? Everytime I start the car, I get Camshaft Position Sensor P00342 (Camshaft Position Sensor "A" Circuit Low), and misfire codes for cylinder 1, 2, and "multiple cylinder misfire" codes.
Based on the above condition, and ignoring the crankshaft sensor for the moment, why would it ALWAYS misfire on ONLY 1 and 2, never 3 and 4? I have pulled the plugs in the past and confirmed they are all getting spark, plugs look OK, though 1 and 2 are fuel wet. Could it be that the cam timing is different on Beta I vs Beta II, and the ECU isn't handling it? Would a weak signal from the cam sensor ONLY affect firing on 1 and 2?
Unplugging the cam sensor has the car running exactly the same as before. Maybe this means the ECU isn't getting the signal? I know the sensor is good, and gets good voltage (12V and 5V reference, and the 5V reference drops to a 2-3V signal when running), and the voltages are good all the way through the connector into the wiring harness. Maybe I need to test the signal voltage at the ECU pin, to confirm it is still 2-3V?
I also investigated the CVVT valve, just to confirm it wasn't stuck open. When I removed it, it fell apart into two parts, the solenoid and the valve body. As an experiment, I removed the plunger, and reinstalled it. Now both the retard and advance sides of the CVVT system are equally presurized. Car ran exactly the same. I doubt the CVVT system is an issue for basic running/idling/the problem I am having now, but when/if this car is running down the road, I will revisit the CVVT system for power and efficiency.
In short, does the misfire only being on 1 and 2 mean something? Seems like a strange thing, and something I will think about.
Last edited by drweird; 04-14-2017 at 08:41 AM.