'90 & '91 Power Transistor, the same?

[tsi_turboawd]

I get NO spark ONLY on the #4 and #1 which are on the same side(if you'd look at the coil pack) VS. #2 and #3 side which gets spark. So obviously now my car runs rough.

The COIL packs have been swapped out and same result. I was told that it could probably be the POWER TRANSISTOR. Since its the one that sends signal to the coil packs.

So is the POWER TRANSISTOR from a '90 the same as '91? turbo or 2.0 non-turbo matters?

HELP!

 

[jjtsi]

90 & 91 transistor packs are different.....it shouldn't matter if its non turbo or not

 

[bobgeorge]

ecu caps,i would check them for good measure

 

[steve12345]

Yes, definetly check your computer first I had the same problem and I replaced the power transitor thinking that was it but it was the computer and also my car was also only firing on 2 cylinders too.

 

[tsi_turboawd]

if the '90 and '91 are different then ill just take a one off a '91 2.0l non-turbo since theres no '91 turbo at the junkyard.. If this doesnt solve then ill check the ECU. thanks