Accepted Answer

Hi,
You are correct about the cam and crank sensors not being an issue. The vehicle would not run if the crank sensor was bad, and the cam sensor only gives camshaft orientation to begin timing at startup.

Your ignition coil has two feeds from the power transistor pack for, you guessed it, cylinders 1+4 and cylinders 2+3.
It sounds as if the transistor for 1+4 inside the power transistor pack has burned out or the engine speed loop has come unhooked (1+4 loop through it, wiring is at the firewall center).
The power transistor is mounted just beside the ignition coil pack, mounted vertically.
Check to see if you have voltage signal to fire from pin 8 (wire black with white stripe).
You can compare to pin 1 (blue/black) which is for cylinders 2+3.
If you don't have pulse, your transistor is burned out.
If you do, the transistor is good, and your wiring to the coil is bad. .

For reference, the power transistor is part # MD189747 and lists for $161.45 from Mitsubishi. I would not recommend using an aftermarket part, should you need to replace it.

If you need further explanation, just ask.
Thanks

Expert:	Doug C
Pos. Feedback:	100.0 %
Accepts:
Answered:	10/12/2009

ASE Certified Technician

16 years automotive and OTR repair including specialized training from Toyota and Mitsubishi