the pump and potentiometer have been replaced from a running car so maybe the ecu is the next step????
il av the garage look at the ecu compartment, looking at the wiring diagram on autodata the whole thing isnt that complex really, il post back 2mrw and let you know, thanks for your time peeps, its much appreciated!!
Please keep us posted
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When my potentiometer failed in mine (only rough at tickover) worn track on the pot so no signal for ecu,I had the codes read and interestingly cruise control came up as a code on mine and mine also has no cruise control.Worn pot in pump will not throw a code or light up as although it is part of pump it is not a sensor as such,the ecu uses it to know position of internals in the pump,but if it does not get the information from it then it will not know where its at and in my case the car would rev up to around 11/1200rpm in an instant and then drop to where tickover should be and then again rev up,all in an instant so fast that the rev counter hardly moved more than 50/100 rpm up or down.Does your system run the later set up with a maf sensor ?
If it is waterlogged,dry it out as in the above link by putting it on a rad or airing cupboard,it may work it may not but its worth a try.
jimm love (19-05-2009)
rite, iv spoke to the garage today and im having the car back. im not paying them to trawl through my loom wen i can do it for free!! so wen i know somthing il let you all know!!
ok, picked car up from garage today and driving home it tried to kill me as expected! however while i was feathering the brake and switching the ignition on and off i decided to turn the traction controll off (it was wet and i was approaching a sweet right hander) and the bloody thing decided to behaive completely normal! so i tried turning it back on again and it revved its tits off again, turned the tc off and hey presto no revving!? left it off rest of the journey and all is ok???? god knows whats going on??? all i know is that im £500 out of pocket and im finding it very hard to hate my precious bimmer!!!
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