? about codes
#1
? about codes
So I scanned my car for the first time after the cam swap gone bad and I got two interesting codes.
Code 33 and36, map sensor high voltage problem and high res pulse error. That has to do with the optispark right (the second one). So my question is would those two things cause my car not to start. Any help would be greatly appreciated
Code 33 and36, map sensor high voltage problem and high res pulse error. That has to do with the optispark right (the second one). So my question is would those two things cause my car not to start. Any help would be greatly appreciated
#2
With a large cam (or incorrectly adjusted valves), it isn't unusual to see the code for high MAP voltage. It sets when the reading is above 68kPa when the throttle is less than 4% open. Engine misfires or unstable idle can also contribute to this code, since they reduce manifold vacuum. You could also get that code from a short in the MAP sensor wiring harness. It is very common for the plastic harness connector to crumble as it ages, causing erratic voltage readings.
Loss of high resolution pulse from the Opti should not keep it from starting. The PCM should be able to set the timing from the low resolution pulse. There will be a slight loss of timing accuracy, but not enough to make it run noticably worse. That's the theory... in practice, I've seen people post here that they engine would not start due to DTC 36. Check the Opti harness connectors for corrosion or bent pins.
Loss of high resolution pulse from the Opti should not keep it from starting. The PCM should be able to set the timing from the low resolution pulse. There will be a slight loss of timing accuracy, but not enough to make it run noticably worse. That's the theory... in practice, I've seen people post here that they engine would not start due to DTC 36. Check the Opti harness connectors for corrosion or bent pins.
#3
Ok thanks alot, I will check those items. This was just a test before I start tearing it apart again. Some people think its a blown headgasket but Im not sure how that could happen. Here's my full explanation of that crazy story.
https://www.camaroz28.com/forums/sho...d.php?t=624381
Anyways if it is blown is it possible that it could lose enough compresion to not start?
https://www.camaroz28.com/forums/sho...d.php?t=624381
Anyways if it is blown is it possible that it could lose enough compresion to not start?
Thread
Thread Starter
Forum
Replies
Last Post
johnsocal
Automotive News / Industry / Future Vehicle Discussion
4
08-29-2002 10:01 AM
Darth Xed
Automotive News / Industry / Future Vehicle Discussion
14
08-07-2002 12:21 PM
BigDarknFast
3rd Gen / L98 Engine Tech
4
07-08-2002 01:37 AM