Ive got an EF series II. Just recently and slowly with more occurences its been misfiring a little, its usually when its under load ( up a hill or giving it accel in 4th). or generally just givin it some, but not all the time??

i know sweat d**k all about why it might be happening, my initial thought was fuel inpurities or something like that but, it also hase a little bit of a rough idle, and with the only performance mod at present being panel filter, this is not normal??

Ive read posts about timing and this seams to fit, i havnt touched the computer as i wouldnt even know where it is...and i think ive read that with EF's you cant change timing at the ecu anyways? so it just might have swayed over time...anyways im just rambling so any thoughts would be great!!

thanks
JoHN