Ok, checked the coil packs cold. Primary is .7 (.5 - .7) secondaries are 9.79, 9.79 and 9.41 (5 - 11). Moved the #6 wire away from the O2 sensor wiring. Tested the ignition module. It checks out fine. Could it be something in the boost control path. The car runs strong unless I take the boost to the right side of 0 on the boost gauge. Any past 0 causes it to missfire and fall on it'* face. Doing flow testing on the cat tomorrow. I am at a loss here. Checked all the vacuum lines that I could find. Just Seafoamed it, we'll see what that does. Any other ideas would be greatly appreciated.


Don

This is starting to be a real stumper here. A plugged cat is a possibility. Lets see what that shows.

Seafoam didn't help the problem. Probably helped the clean the top out but didn't help solve any of this problem.

I can run the car up to highway speed as long as I stay outa the boost. I am not familiar enough with the setup to know if there could be a problem in the boost control system that causes this. It is getting around 20mpg on the highway.

Do the symptoms support a cat problem.


Btw just to refresh everyone. This problem started 90 miles after a plug/wire change. Could it be a bad plug wire? I still have the old set and am tempted to put them back in.


Don

Test your wires. And put the old ones back on. Pull the new plugs and inspect them. Look for one that is different from the rest.

Just put the old wires back on. No change. Has a new set of AC Delcos in it now.

Don

We could use some input from billboost here. Where are you Bill?

Hoping this question didn't get lost in all the mess.

Could there be something in the boost control path that is causing all this?


Don

Have you tried running with the supercharger belt off? It wont hurt anything. But if it still misses it may rule out the supercharger.

Dan,
No, that was the next step after the check the flow in the cat tomorrow.


Don

Could the supercharger be causing all this?

Don