Jerking Sport.

[AC_S]

Jerking on Full Throttle between 3500 and 4000 rpm in 3rd and 4th and 5th
is this a diff problem?

[Martinaston]

HT leads or dizzy cap and arm ?

[e30kev]

what about in 1st and 2nd gear could be a split in one of the hoses letting air in, seen it diagnosed on a 1.8 e34 yesterday and it was kangaroo city, check for a split after the maf

[miren]

i had same problem in every gear
turned out to be ignition coil, but chaged dizzy cap and rotar arm at same time, i suggest changing these first, check eurocarparts, decent prices

[AC_S]

Cheers,
Will do.