Are you saying that there currently is no code in the computer?
Are you looking for ideas as to what could be cause this condition?
Does it happen all the time or intermittently?
No, it has not kicked a code for me. Since September I have been waiting for it either stop running or kick a code, but it has not done so yet. Winter has kicked in hard here in Utah and I do not want to get stranded in extreme cold if and when it breaks down, which is why I took the vehicle to a mechanic.
It has been doing this during the first five minutes of running after start up. Outside temperature conditions make no difference. Once the vehicle has been on the road and running for a while it will quit.
Yes I am looking for what may be the cause?
Yes, the tach jumps around when this is happening. Because I see the tach jumping I feel that the electical power is being intermittently cut. Maybe something related to auto shut down???? Without it kicking a code though I am in a quessing game.
Ok.. yes... this is very common!
Has the camshaft position sensor been replaced? If not, this might be our next step. Both the camshaft and crankshaft position sensor go bad and short out causing your rough running and can even cause your tach to jump around. The only other thing causing this would be a module on the BUS circuit. For example, the instrument cluster, PCM, BCM, TCM etc...
The Camshaft Position (CMP) Sensor is mounted in the distributor housing
Your picture of the distributor has refreshed my memory. I replaced the complete distributor about six months before the first crank sensor. About 14 months back.
SO one of your new sensors can be bad (very common) or one of the modules on the BUS system is shorting out causing your condition.
I hope this helps. You can always accept my answer now, and repost back again later on if you have any more questions. If you want to discuss it some more just hit "reply", it's free to do so otherwise don't forget to hit "accept" and leave positive feedback if you found my answer helpful.