Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
I am sorry your having this problem
was it doing this before the tune up and complete distributor was changed ?
if you unplug the EGR valve will it still do this ?
see it it still does this with it unplugged
this is a complete new distributor or a rebuilt one ?
and if you leave that timing connector wire unplugged it will not miss or idle rough ?
this should not be a knock sensor issue pulling the timing like that as that would retard the timing
if with the timing light before you plug in the timing connector the timing mark is not jumping and is nice and solid at 4 degree's then the only thing left is the computer itself pulling that timing advanced when it should not be
i was saying if the timing connector is unplugged and it does not jump around the odds of a timing chain issue are ruled out is what i was getting at
since it advances like this just when plugged in the only thing left to do this is the computer itself
dont forget to rate us here at Justanswer as i do not get credit for my work until you rate us here
you can always get me back through this post any time for any follow up