[BJPK]

so i got up early to go fishing pull onto the free way and i have a bad missfire under load
97 g16b 3 wire af meter
where is the diagnostic plug? and which to pinouts do i short out? for codes.
no check engine light on dash.
changed plugs no difference
removing leads one at a time causes rougher running
as does doing the same with injectors so fuel and spark appear ok
dont have a compression tester handy but i doubt it would of just burnt a valve for no reason.
cheers peeps.

[JrZook]

How did you remove the leads and injector plugs when the engine was misfiring under load.....

[BJPK]

done at idle but vehicle is slightly missing at idle also

[want33s]

Misfire under load suggests to me a spark problem.
I would be looking hard at plugs, leads, dissy cap & rotor button.

[JrZook]

Do what Jas has suggested first. No need to go all balls in and start with the more complicated stuff

[Built4thrashing]

Wait til its night (dark) and watch for arcing on the leads. normally happends as you increase revs a bit.

[BJPK]

dist cap looks pretty worn out, will replace this and leads and see how we go. cheers guys

[BJPK]

one other question, does the rotor button just pull out?

[JrZook]

yes