Throttle body?

[NZ00Z3]

Have you cleaned the idle control valve? The ICV controls the revs up to about 2,500 rpm, then the throttle body kicks in.

 

[motco]

The car has been sitting inside and started once or twice a week to move it around with no problems at all. The battery was robbed for another car and a weaker replacement fitted. Sometimes it will start on its own, sometimes needs the jumper pack. Then suddenly the throttle problem. If it was the fuel pump or filter I can't see it being an instant problem. More likely electrical problem and I am leaning towards an ECU problem caused by using the battery pack to jumpstart it.
Anyone know of a mobile BMW specialist in the Maidenhead area?

I use CPC Performance in Amersham. Phil Crouch, the owner, knows more about BMWs than anyone else I've ever met. He is hard to contact but don't lose heart - try from 07:00 on his landline. http://www.cpcpe.com/

 

[jaguartvr]

Gave the IVC a clean when it was removed.
I have a cheapo scanner that pulled a few codes, I find Z3's a bit hit and miss when trying to read codes. On this one a 2002 2.2 I can only connect to the round plug under the bonnet. On my 2000 2.8 I can only connect to the plug under the dash.
I have on the 2.8 tried a professional garage scanner with the same results.
CPC look good but I need a mobile service as the car has been stripped of all its outer panels.

 

[motco]

Then Simon Besant may be able to help simon.besant@btinternet.com
Simon is a Westfield Sports Car Club member and runs a mobile mechanic business. I use him occasionally and he is pretty knowledgeable. He's in Wycombe.

 

[jaguartvr]

UPDATE

Had an electrician round to have a look. Plugged in and no sign of the throttle and throttle body connecting. Put a MAF from a 2.8 onto the 2.2 and the connection was visible but as soon as the throttle was pressed it coughed and then the connection was gone.
Bought a new MAF from eBay for £23 and all is now working correctly.

 

[motco]

Good news!