Hunting Idle and slight hesitation at low RPM...

[PazzaAE86]

The M30 idles OK but hunts a little bit, just slightly and upon initial throttle it stumbles a little sometimes.. Seems to run on less than all cylinders when first started up also, a quick rev later and its sound..

Plugs are new, Rotor cap and arm looks brand new.. Leads and Coil arent new. Perhaps Air Leaks? The intake pipe doesnt look to be in the best condition...

Cheers, any thoughts?

[leeparkes]

The intake pipe doesnt look to be in the best condition...

Cheers, any thoughts?

Get some carb cleaner and spray around the intake system, if the revs rise you've found your leak.

[jonny323i]

chris i have another coil of a 320i if you want to pop round and try that one to see if its any different

[zaust]

I would try resetting the tps first. Then start looking for an air leak.

[PazzaAE86]

Thanks Jonny will give you a buzz if anything points to the coil, so far though the one you gave me sparks nicely.. We'll see!

How do i reset the TPS? As in, re-calibrate it?

[Gunni]

Adjust the position where the Idle trigger occurs and WOT trigger.

You should download or buy the Haynes 5series manual, it has everything on the M30 you need to know.

You hunting idle is 99% vacuum leak.

[PazzaAE86]

I just nailed some carb cleaner over the intake and nothing changed in the idle speed, pulling the dipstick out however caused the idle to change.. Still not ruling it out though as my pipes are pretty rank.

It seems to have calmed down a little bit to be honest, its livable anyway. Will get a Haynes at some point aswell im sure, instead of calling you every 5 minutes

[bmbartlett]

Did you ever solve this mate?