3.9 ecu and/or lamda sensors

Jul 14, 2008 6 Replies

Don't spose anyone has got an ECU and/or lamda's lurking at the back of the garage and want a few beer tokens for them do they?



Am now utterly pee'd off with Enterprise - I changed the plugs on friday night and all was good for 12 hours, then back to rough running.



Changed the Air flow meter - no change



Changed the Fuel filter - better, but essentially no change



Changed the coil - no change



Changed the dizzy cap - no change



Changed the rotor arm - no change



Changed the stepper motor - no change



I took the lamda's out yesterday and they were very sooted up, but unplugging them whilst idling showed no immediate change, so could it be a fecked ECU?



Hence the ask, change the last two components, and if it still runs like a bag of poo then its going to be relegated to the yard and i'll get the series 3 back on the road :-)



Si


Before condeming the ecu, try swapping the tune resistor for another - I can't remember if green is for closed-loop lambda control and white is open loop off the top of my head, but try it open loop and see if it's still got a problem first. Badger.

Hi Badger,

thanks for that idea - where should I search for the resistor?

Si

Hi Badger,

thanks for that idea - where should I search for the resistor?

Plugged into the efi harness pretty close to the ecu/relays. Badger.

oh right no good then there is a company in warrington who will test the ecu and see if it is duff or not.

Medway

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