hi all i have a e30 m52b28...first time having it out yesterday and its limitering at around 5300 revs. what could be the reasons for this?
Cheers Alan
m52b28 e30
Moderator: martauto
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rich318i
- E30 Zone Addict

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speed input to ecu 100% wasn't wired up
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ajay
- E30 Zone Camper

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As above, have you wired the road speed signal to the ecu, the ecu needs to know how fast the vehicle is traveling. The symtoms you describe highlight this as a posibility, have you checked for fault codes? Check both the above.
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tbone455ci
- E30 Zone Newbie

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- Location: London, Uk
Hi mate
Did you get it sorted? Im having a similar problem but not revving past 4000, well it splutters after 3000 to 4000rpm badly.
Did you get it sorted? Im having a similar problem but not revving past 4000, well it splutters after 3000 to 4000rpm badly.
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alangorst
- E30 Zone Newbie

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- Joined: Sat Nov 03, 2012 11:00 pm
Not yet no
I'm goin for the speed signal thing that everyone has suggested but as far as I've got is finding out what wire it is from ecu. Maybe get to it tomorrow night.
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tbone455ci
- E30 Zone Newbie

- Posts: 46
- Joined: Mon Jul 24, 2006 11:00 pm
- Location: London, Uk
Hope you get it sorted mate. I been having probs for the past 2 weeks, with misfires which was camshaft sensor to missing which was a bad coil pack but the bimmer still not revving past 4000rpm
I think its different to yours? But I will let you know when I get it sorted & may help you
Try and contact DanThe, this man knows a lot and should be able to help you....
I think its different to yours? But I will let you know when I get it sorted & may help you
Try and contact DanThe, this man knows a lot and should be able to help you....
