Engine multi misfire code

hmmm...i need more variables...what mods do you have done to your corolla,
next thing i would check is the fuel injectors. what does the car sound like at idol...any ticking things of that nature...agian i need more variables

multi misfire code

my check engine light came on in my 01 corolla and it was for a multi misfire and i changed the plugs but it still came on i dont know what it is. anybody have any ideas about what is causing it. It runs rough at idle but when driving it does fine.

the car runs rough at idle but no weird noises it sounds like it is loping i only have a short ram intake and cat back exhaust with hi flow converter and ported intake manifold and nitrous. the car still performes good and the nitrous still kicks ass on it. it just idles rough i did a compression check and there all at about 155 psi. injectors are good and coils are good new spark plugs so what can it be

155psi is pretty low unless you've altered compression somehow. Should be in the neighborhood of around 200psi. Depends on elevation, though.

I'd agree that the fuel injection could easily be the culprit.

Trav

i took the injectors off my old motor and put them in the it was the same.