Engine misses at 4000+ RPM

Sat Apr 14, 2007 11:30 pm

Has anyone had this before on a 1988 320i (M20 Engine)....

Above about 4000 RPM the engine becomes slightly jerky, (possible missfire). It is particularly noticable under heavy load.

I have changed the plugs, but not the leads or distributor cap. Any ideas? Could it be fuel or ignition?

Thanks.

Sat Apr 14, 2007 11:35 pm

Possibly lacking fuel pressure,difficult to check without pressure guage,may well be caused by dirty fuel filter,has it been changed lately?

Sun Apr 15, 2007 2:23 am

Dude, its the Air Flow Meter, im in waiting for an Air Flow Meter in the post for my 2.7, this happened to me last week for the second time so its going to be my second change for the same reason you`ve had, i think i might contemplate either buying a brand spanking new one .one day or start collecting them in my garage for future replacements

...

Change it and smile again!!!

j