Slight Miss/ign question

[gp90se]

my lq1 (92 3.4) has a very slight miss at lower rpm, and maybe top end, but it can't be felt there. New plugs and wires in it, fuel filter, swapped out the coils/mod for known good ones and seafoamed it. there is a little hesitation off idle when cold as well. The car will stall every once in a while, but runs pretty good outside the little issue. thoughts?

 

Is there a way to test coils?

[Andrew]

you might try cleaning your IAC and MAF.

[gp90se]

IAC is fairly new, and no maf

 

also no o2 sensor, but that wouldnt cause these symtoms

[19Cutlass94]

how are the vacuum lines on there?

[boulevard]

You can test a coilpack by removing the ignition wire from each spark plug, one at a time. Stick a screwdrive near the opening of the ignition wire if theres spark, its good. Plug the wire back to the spark plug, and continue to the next one. If you don't get a spark or it seems very weak, then you will know whats wrong with your system.

[gp90se]

I'm looking to test how much output im getting from each coil, because they all are firing. the vacuum lines seem to be decent, but I can double check them sooner then later.

[rockfangd]

wait no o2 sensor?

[Andrew]

wait no o2 sensor?

or MAF ???

[gp90se]

wait no o2 sensor?

or MAF ???

 

91-93 3.4 do not have MAF sensors, I think your thinking somthing else

wait no o2 sensor?

 

Yea....I gotta put one in one of these days

[gp90se]

TTT there has got to be a good way to test coils