1988 7MGE Misfire - Stumped!

[cre]

Of course I'm right....

I edited my last post.

Yeah, looks don't say a thing for plug wires. Try swapping 2 and 3... I think they're about the same length, same for 4 and 5... or was it 5 and 6?



EDIT: Oh, and BUY A MULTIMETER!!! Even a cheap one.... you're going to need it. Actually I can't believe you've been trying this without one.

[excaliburdj]

Oh, I have a multimeter around here somewhere. Problem is, I just moved not too long ago and most of the non-essentials are still in a box somewhere.

I unpacked all my tools, though.

I'll see if I can find it.

I'll report back. Thanks for the help!

[excaliburdj]

Cleaned all the contacts in the distributor and re-grounded the igniter per the instructions in your post.

No change.

Changed spark plug wire 2 to the 3rd cylinder and vise versa.

No change.

I can pull the plug wire off at the distributor cap and see the spark jump from the port on the cap to the end of the wire if it isn't far enough away, so it looks like both cylinders are getting spark.

But still...cylinders 3 and 5 produce no discernible change in the idle when I pull the wires off.

I re-re-re-verified the timing. Still right on at 10 degrees BTDC.

What's next? Am I looking at an injector problem or something?

[cre]

Injectors. Look at the TEWD and see if those two are paired to one specific line... the injectors are wired in pairs, but I didn't think 3 and 5 were paired to each other.



EDIT:
3 and 5 are paired together, MK3 TEWD On-Line

[excaliburdj]

Hmmmmm...so it appears maybe to be a potential wiring problem then. I'll have to take the sheath off and follow the wires back.

Other than that...what...ECU?

[cre]

Yup. Test the signal wire, then ground wire, then ECU.