I think blottozone might test the module for free (but don't quote me on that).Thunder said:Have you Checked for trouble codes?
If there are none. Then try replacing the distributor module first.
Your problems are pretty common indicator of a bad module.
A bad pick up coil will usually throw a code 42.
If you dont know how to check for trouble codes go here:http://www.troublecodes.net/GM/
readymix said:I never got any codes with mine.
The neighbor did get a 42 but his reluctor wheel was missing one of the tongs..