It started as my car randomly shuting off. It would happed while driving, I would wait a little while, then it would come back to life. Then I removed my Field's harness and returned the electronics to stock. After doing that, the car entered some sort of limp mode where it would stall past a certain throttle position (or maybe airflow, not sure what its based on). It also shook noticably, moreso at lower RPMs than higher.
The only difference between the field's and stock harness is that the field's had the Turbo Pressure Sensor disconnected. I know the TPS is used when the ECU enters limp mode, so I assumed the car would not run before because it was not getting a TPS signal. That is, I'm assuming this is the same problem as before, but the pressure sensor lets the car limp home.
Today I was driving home when suddenly it entered limp mode again. Same as before, it would stall past a certain throttle position, and the car shook noticably.
My OBD2 scanner doesn't seem to be working very well (latest patch screwed it up) when it comes to reading codes. I was able to get P0303 and P0300, random missfire and cylinder 3 misfire, but their could be more. I know my plugs are shot (the car missfires under WOT at only 13 psi, or could that be
another symptom?), the IK22s should be here soon. But I don't see how a missfire would cause all my symptoms (I know it could shake the car if it was only one cylinder), and I really don't understand why the car would enter limp mode because of it.
Also, the ! and MIL lights started blinking during my drive home. The blinked for a few seconds and then stopped. As far as I could tell they only did this twice. Anyone know what would cause the light to blink? I know if the cam and crank angle sensors disagree (timing belt slips) it will blink. But the timing belt has obviously not slipped, as it runs fine most of the time. I have had the timing belt slip, and the ECU would not cut power like it is doing now.
Because I couldn't read all the codes, I looked at every variable available to my logger to see if the ECU was getting the correct signals. RPM, timing, load, MAF, throttle position, O2, even water and air temp all checked out fine. Timing might have been a little high, 23 degrees @ 900 rpm idle (I raised it by joining the 2 PS vacuum lines together). Even at throttle position past where the car stalls, all signals looked normal. My FJO of course read full lean while the car was stalling.
Thanks for any help,
Grant
'97 T66 6-speed
PS: This all started after a run at an autocross, about a week or two after getting my single running.
The only difference between the field's and stock harness is that the field's had the Turbo Pressure Sensor disconnected. I know the TPS is used when the ECU enters limp mode, so I assumed the car would not run before because it was not getting a TPS signal. That is, I'm assuming this is the same problem as before, but the pressure sensor lets the car limp home.
Today I was driving home when suddenly it entered limp mode again. Same as before, it would stall past a certain throttle position, and the car shook noticably.
My OBD2 scanner doesn't seem to be working very well (latest patch screwed it up) when it comes to reading codes. I was able to get P0303 and P0300, random missfire and cylinder 3 misfire, but their could be more. I know my plugs are shot (the car missfires under WOT at only 13 psi, or could that be
another symptom?), the IK22s should be here soon. But I don't see how a missfire would cause all my symptoms (I know it could shake the car if it was only one cylinder), and I really don't understand why the car would enter limp mode because of it.
Also, the ! and MIL lights started blinking during my drive home. The blinked for a few seconds and then stopped. As far as I could tell they only did this twice. Anyone know what would cause the light to blink? I know if the cam and crank angle sensors disagree (timing belt slips) it will blink. But the timing belt has obviously not slipped, as it runs fine most of the time. I have had the timing belt slip, and the ECU would not cut power like it is doing now.
Because I couldn't read all the codes, I looked at every variable available to my logger to see if the ECU was getting the correct signals. RPM, timing, load, MAF, throttle position, O2, even water and air temp all checked out fine. Timing might have been a little high, 23 degrees @ 900 rpm idle (I raised it by joining the 2 PS vacuum lines together). Even at throttle position past where the car stalls, all signals looked normal. My FJO of course read full lean while the car was stalling.
Thanks for any help,
Grant
'97 T66 6-speed
PS: This all started after a run at an autocross, about a week or two after getting my single running.