urgent help please running and starting problems

[1160matt]

hi i have an f reg E30 320i se 6 cyl this has got me thinking . in the thermostat housing in 2 sendas one for the heat gauge (brown 1 pin ) andthe second for the ecu i think (blue with 2 pins) i have replaced the blue one twice air flow meter and idle control and butterfly reader but what the it does is revs its self up from 750 rpm to 1500rpm just like there is some one bliping the the throtal but if you rev it up it flat stops and trys to die but if you unplug the blue one its better but not great but if u bridge the plug its fine just wont start in cold please help just spending money and get no results

[Ant]

Id suggest you have a missive air leak somewhere dude, the unmetered air would cause the rpms to rise on their own exactly as you've described, get under the hood with some carb cleaner and see if you can locate any leaks

Intake manifold gasket, intake bellows, the breather pipe under the intake itself can split, injector O rings that have perished and split etc etc

lots to look for, the carb cl;eaner will cause the rpms to rise when sprayed @ the meak

tect all the above before spending any more Ԛ£Ã”šÃ‚£Ãƒ”šÃ‚£ dude, and post your location(add it to profile), someone local may well be able to help diagnose this.

HTH and keep posting M8

[1160matt]

the ecu heat senda plug if u bridge it its fine

[Ant]

perhaps the blue sender unit is incorrect or faulty dude ? I assume its brand new not second hand ??

[Andy_magic]

Check you haven't got the TPS and the ICV plugs round the wrong way.