Misfire at stutter at 4k - Vinnychoff
my friend has a bmw 323 which has developed a fault.

when overtaking or accelerating through the gears. when reaching 4k the car misfires holds back.

i have had a quick look over the car but i have no access to diagnostic tools. i have a good digital meter.

i did take out the air filter out which was a fram (orange type) did not look a good fit and put back.


anyone know what tests i can do? to dertimine if it is fuel or electrical? using a fluke meter?
regards Vinny