4af misfire

[smiley_666]

hi, ive just installed a 4afc motor in my girlfriends corolla. i took it to trade school today and timed it up properly, and on the way home tonight it started misfiring when i was almost home. it only seems to happen intermitedly, and while the engines revs are low and its under load (putting my foot down at about 10kph or so, sometimes faster).
i think its the plugs, just wondering if that is the most likely cause, or should i be checking elsewhere.

[Casey-G]

Check for vac leaks ect..

Replace plugs/rotor cap and button.

Probably wouldn't hurt to do the fuel filter either.

If that doesn't help, buy a timing light and see if the timing is out and if it is set it back to factory spec.





if that doesn't help, install a 4azge.

[TRD-12A]

Sounds like your leads need replacing, check for resistance in all the leads you will find that one will be opengiving you a reading of zero, change the plugs while you are there,

I would also check the cap & rotor and the coil

[smiley_666]

ok, thanks. i was going to check the leads anyway, and i have a spere set off the other motor anyway. was just wondering if there was anything else to check, but ill just do these tomorrow.

[william]

did you happen to wash the engine bay at said trade school?

[smiley_666]

nope. just timed 'er up. seems to do it when cold, and then just randomly at low throttle openings.
ill check all i can think of tomorow