i went down to santa pod the weekend and raced 3 cars, and was all happy til just before i got home and the car started to judder and engine man light came on, so i pulled over and shut the engine off and back on again and everything was fine. but as i was on the way home i tested it in all the gears, and this is the problem, finally, when its on tick over it's fine, if i go past about 3000 revs in 1st, 2700 in 2nd, 2400 in 3rd or 2100 in 4th it starts juddering again and the light comes on, but if i very (and i mean very) slowly accelerate then i can go past them points and nothing happens. so i'm very and don't no what to do.
just in case, on the way back i was low on oil, and i use semi syn, but i could only get fully syn, plus i put a new afm and lambda sensor on last week. and just put on courtenay power pipe and air pipes. just in case it makes a dif.
cheers if anyone can help.