It is not advancing properly. I have been reading back on some posts recently, and ran across this a number of times and its from when something is not hooked up right (and it always dies at 3500)... It has something to do with timing.
I would check the following:
-check PIP sensor; see this thread
-that you have your advance plug on the distributor attached (easy one)
-that the tfi is in working order
Eric
I would check the following:
-check PIP sensor; see this thread
-that you have your advance plug on the distributor attached (easy one)
-that the tfi is in working order
Eric