Hi all sorry to hi-jack the thread my 1996 3.9v8i has very similar symptoms,start it up and it's fine on cold start as soon as it drops to idle speed the revs become very irregular i.e it goes from 750 to 1100 to almost stalling but picks its self back up,how ever 9 times out of 10 if you turn it off take keys out of ignition and leave it for a minute then re-start it it is fine,i gave it a complete service about a month ago(oils,leads,dizzy cap,filters didnt do the fuel filter as mentioned in another post) and it sorted out but now the problem has returned any advice greatly appreciated,cheers danny.