ignition trouble

[Spikefro]

Alright, just bought the car not too long ago. What i know so far is that cylinders 1 and 4 are not firing. 2 and 3 are. Known good: plugs, wires, transistor, coil, mpi relay, CAS, ecm.

I've been doing a lot of checking on the harness, I've torn it out and ohmmed all of the wires pertaining to the ignition system. A guy before me tried fixing it but it scares me to talk about how he thinks. He liquid taped the transistor connector wires to try to fix it. I've shortened it and resoldered the connector. The yellow wire going in between the transistor and ecm had a distorted terminal which i replaced and resoldered. I'm stuck, in addition the car has low compression and burns oil.

Any suggestions? Thanks

 

[Mrdiamondstars]

Leaking caps in the ecu....................had me stumped for 3 months

 

[Spikefro]

i dont think the caps are leaking, the ecu has been replaced and ive relooked at the ecu and the caps look fine. There is no discoloration on the board, solder trails are clean, and the capacitors are in tact.

 

[bryanwheat]

If you KNOW that the coil pack, transistor, and cas are in good working order than i would suspect something in the ecu or wiring. You have for sure tested the coil pack, transistor, cas, and continuity on wiring harness. If the components are functional, and the wires between the ecu and components are functional than there is really nothing else that it could be other than the ecu.

 

[Mrdiamondstars]

From experience I did the same thing you did until I took a long shot and sent my ecu off and they confirmed leaking caps. I literally spent three month throwing parts at it, but it ran smooth as hell when I got my ecu back

 

[Spikefro]

alright i guess i will take a stab at throwing a different ecu in it and see what it does thanks for the suggestions

 

[bryanwheat]

I wouldn't just buy one any throw it in there. I would see if you can borrow one from someone to check. Any 91-94 turbo ecu will work.

 

[KyDSM]

Same thing happened to me. I replaced tons of things and was still stumpped for about a month. Finally thought about it could be the ECU. Slapped one in and my car ran smooth.

 

[Spikefro]

Ordered an ecu and put it in and know i have it running on all four again thanks for the advice guys, for now i have to measure my bore because i suspect it to be bored out but i dont know and if so would anyone know where to get some new rings?