1990 Subaru Legacy only 1/2 ign coils firing

[Pete]

This is what I've done so far........

Replaced coils... Still 0nly 1&2 fire, 3&4 no reading digital multi
Replaced ignition computer ... still same
Replaced electronic controls...still same

If anyone has Any idea, I would sure appreciate it, I too am too poor
to afford a mechanic, but mech inclined enough to follow instructions
and check ideas


Thanks for your consideration

 

[strchild]

Is the check engine light on? If so, start by posting codes. Google the
group here for instructions, as they've been posted a gazzillion times. (-;

~Brian

 

[Steve Parker]

This is what I've done so far........

Replaced coils... Still 0nly 1&2 fire, 3&4 no reading digital multi
Replaced ignition computer ... still same
Replaced electronic controls...still same

If anyone has Any idea, I would sure appreciate it, I too am too poor
to afford a mechanic, but mech inclined enough to follow instructions
and check ideas


Thanks for your consideration

Pete,
Have you looked at the wiring? It could be corrosion in the connectors
especially at that age.
Sparky

 

[S]

Hi Pete!

This is what I've done so far........

Replaced coils... Still 0nly 1&2 fire, 3&4 no reading digital multi
Replaced ignition computer ... still same
Replaced electronic controls...still same

If anyone has Any idea, I would sure appreciate it, I too am too poor
to afford a mechanic, but mech inclined enough to follow instructions
and check ideas

When you say "ignition computer", do you mean the ignitor module?
~2inX3in black module on the firewall behind the engine? If not, try
that. Otherwise, as suggested, check all wiring, harness connectors,
and other assorted connections in the engine compartment. As in pull
the connectors apart, check for corrosion or loose/out of position
pins, clean, and re-mate. Particularly check cam and crank position
sensors. See if you can get it to give you a trouble code. As a last
resort, put in another ECU.
If this doesn't get you going, ya gots troubles in a big way; start
going over the engine compartment grounding, maybe? Unlikely, but
possible you replaced a bad module with another bad one? Find someone
with a working car and swap components if at all possible. Should be
mostly the same hardware thru '94 or so.

Good luck. ByeBye! S.

Steve Jernigan KG0MB
Laboratory Manager
Microelectronics Research
University of Colorado
(719) 262-3101