91 talon tsi awd please help

[Bigworm]

Alright guys here it goes. I've researched and researched and still can't find what I'm looking for here's my problem. I just bought a talon it a 91 tsi awd it ran OK this is my second so I know how they should run. It was running OK it had an intermittent performance problem it would run rough I'd turn it off then back on and it would run great. So I looked around and came to the conclusion its timing was a little off. I also noticed a new CAS so I figured I would adjust it. I ground the timing wire and hooked a light to it and set the timing now it only runs on two cylinders #1 and #4. #2and #3 have no spark. I thought it was the CAS since it ran before I messed with it so I replaced and nothing. So I then replaced one of the coils and still no go. So now I'm kind of at a loss. I looked around the site and now I'm wondering if its either the PCU or the PCM. my last and most expensive option is the ECU which I have sitting in the parts store right now but that's like another 300 to 400$. Any help would be great. Please help me.

 

[snowborder714]

Please try again with a more descriptive thread title. A generic thread title like this does not help me when browsing new threads to see if I can offer help or when searching old threads for info to help myself or others.