Just want to double check. Yes or no.

 

Yes,yes,yes,yes,yes

 

It shouldn't unless it is shorting or grounding back to the low reference pulse circuit to the opti. You could run perfectly fine without a crank sensor on an LT1 (you would get a trouble code for the sensor, though).

 

So it in no way assist the PCM with ignition timing. Why is it even there?

 

To detect miss fires. That's one of the differences between OBD1 and OBD2.

 

OK so its only an indicator of a possible miss fire (which is consistent with the problems I am having). If that is the case why would I not also be getting codes P0300-P0308 for Mulitple misfires?

 

because it is not getting feedback from cps....... it compares feedback betwwen cam and crank...

 

So if the position of the crank does not agree with the position of the cam sensor(which coincides with the position of the opti) the sensor will throw a code is that correct? Therefore the the cam may be out 1/2 a tooth or more causing the issues I am experiencing. Does that sound right?

 

Your PCM reads the crank position from two sensors, one comes from the opti and the other from the CPS on the timing cover. When the two don't match it will throw a P0336 code. This code could mean that your CPS is bad, or it could mean that your opti is faulty.

 

In an extreme case it can mean the timing chain is real loose. You can even get CPS codes from driving on an extremely rough road.

 

I think it may be in my case that the cam sprocket is off one tooth. After researching some other threads, I found several people that had the same symptoms as me that found they had this problem.

 

I don't think that your timing chain being off a tooth would effect the CPS readings. Your cam timing would be off, but your crank position would still be the same. Has your car always run the same and just recently you got the CPS code? What was the situation surrounding you getting the code?

 

This all relates to this thread.
https://www.camaroz28.com/forums/sho...d.php?t=671212

I am not concerned about the CPS code OTHER than I have been told that it is an indication of misfire which is the problem I am having.

 

How did you install the timing chain?

How did you set the lash?

Personally unless you weren't paying attention when installing the timing chain, you can't really screw that up. Meaning as long as you did it with the heads off and #6 and #1 were at TDC lining the dots up should be a no brainer. When lining the dots up you need to set the lash with #6, not #1.

 

Yes, but the opti is what is being used for comparison to the crank sensor. The opti calculates the crank position (which is why the LT1 does not need the crank sensor for ignition firing purposes). So, if the chain was a tooth off, the two signals being compared would never match up.