my 96 rover 820i runs very rough when cold but fine warm.. when you try to take off the car will sometimes stall and sometimes it will nearly stall but recover. took the sparkplugs out and thet were sooty so i assume its an over-rich mixture whats at fault so far this is what i have changed coolent temp sensor ait temp sensors throttle pot sparkplugs thermostat vacuumpipe from the inlet to the ecu anyideas cheers
This may not be the actual cause, but if you've replaced the throttle pot then you have to go have the new one "set up" at Rover. To save money on this, remove the entire throttle body from another in a breakers and put that on instead, but do not remove the throttle pot from it!
Have you run the stepper motor reset procedure? (also consider stepper motor a possible problem). Turn ignition to ON (but not started) press the accelerator 20 times fully, switch ignition off, wait (you should hear a clicking) then turn back on and start up.
Also, try taking the battery off for twenty minutes.
To check the ECU is functioning properly, disconnecting the coolant temp sensor when the engine's running should make a noticeable difference to engine note, if this doesn't happen some sensor is forceing it into "limp home" mode.
Finally, cleaning the throttle body out can help, there's a good guide in .pdf format on the owner's club website,
the took the car for a drive and it was much better on pulling off but it still did it between gearchanges so i will be going to the scrapies for an ecu. the car is 96 with mems multipoint injection whar models of rover could i get an ecu and does it have to be off an 96 cheers aul thanks paul i unpluged the cts and there was no change to
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