Jerking at 4000+
Moderator: martauto
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koos
- E30 Zone Regular
- Posts: 584
- Joined: Wed Jun 29, 2005 11:00 pm
- Location: Crawley, West Sussex
Had my 320 for 3 or so months and ever since it's had a bit of a jerk on acceleration from 4000 up? Bought a K&N panel filter just cos I wanted one (not to worried about the jerk) and it fixed the jerk, funny thing is the old filter was still pretty new. Strange but true. K&N's fix all-It's the miracle filter
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stevo
- E30 Zone Regular
- Posts: 984
- Joined: Sun Mar 06, 2005 11:00 pm
- Location: Kilmarnock, scotland
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dazleeds
- old skool raver
- Posts: 12883
- Joined: Fri Apr 01, 2005 11:00 pm
- Location: Empire Building @
mmmmmm i used to get a strange jerk as u described
hasnt happend for a while tho Daz
hasnt happend for a while tho Daz
www.oldskoolfantasy.co.uk
in the shit,the one to blame,yeh its all my fault ;)
in the shit,the one to blame,yeh its all my fault ;)
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rickk
- E30 Zone Newbie
- Posts: 96
- Joined: Tue May 10, 2005 11:00 pm
- Location: Netherlands, E30-1 325i
I've found that this is related to a mixture problem... If the mixture is a little too lean you'll experience exactly this - slight hesitation around 4k, for some reason, it probably needs all the fuel it can get at this point.
Had this one when I had a 2.5 bar (instead of 3) FPR, had it when injectors were clogged and noticed exactly the same when playing with AFM spring settings.
Note that the AFM will only make a difference in non-WOT situations. On WOT a predefined, slightly richer mixture will be injected - that could also be the problem: faulty TPS.
Had this one when I had a 2.5 bar (instead of 3) FPR, had it when injectors were clogged and noticed exactly the same when playing with AFM spring settings.
Note that the AFM will only make a difference in non-WOT situations. On WOT a predefined, slightly richer mixture will be injected - that could also be the problem: faulty TPS.