Missing on 2 Cylinders

[talontsiwinter]

I have a 92 talon TSI AWD. 8000 km on a full rebuild and it starts running on cylinders 1 and 4. i have switched the coils and it still does the same thing. There is fuel but no spark at all on 2 and 3. Could it be the square ignition box on the side of the intake or is it more likely the computer?? i dont wanna buy a 200$ ignition box if its not the problem. Any input would be helpful!
thanks

 

[steve]

Glad to hear you got it fixed.

 

[rhodess89]

check that coil pack out make sure it hasn't case grounded itself b ohming it out with one on the coil pack probe and the other to the case should read OL if not case grounded.

 

[InterceptorF]

The Transistor that hooks to the coils is broken into 1-4 and 2-3. If you have a bad one it will do that. I got one off a car in the junk yard for 25$ to test mine but it was not the problem (I still have it if you are interested) I had a engine fire and I had wires melted together which was why mine was firing 1-4 only.
There is a test procedure for that transistor as well - get a haines or chiltons on it.

 

[bu3bu3]

I have a 92 talon TSI AWD. 8000 km on a full rebuild and it starts running on cylinders 1 and 4. i have switched the coils and it still does the same thing. There is fuel but no spark at all on 2 and 3. Could it be the square ignition box on the side of the intake or is it more likely the computer?? i dont wanna buy a 200$ ignition box if its not the problem. Any input would be helpful!
thanks

I am not sure if you have fixed it or not but The Power Transistor Module is dead and you need and new one or one that works. I bought my car for cheap because of this problem when the guy said that car acting up like that I bought without even looking at the rest of the car and boom was The Power Transistor Module its a small black box sits underneath the coil pack.

 

[slow1gentsi]

I had some thing similar happen a while back and finally pulled the ecu and found one of the capacitors were leaking. so you might check capacitors on the ecu.

 

[furqani07]

first thing check on the Cam sensor. the problem would be coming from there.. try to replace or fixin it. and when u put the cam sensor back, u should make allignment for it.