Citroen XM Forum

Hi John,

I'm still pretty sure that with a simple wiring mod the car could be made to run properly on an old type ECU, just ignoring the MAF sensor.
iirc.The fuel pump is a generic Bosch VP38 and the ECU is also a generic one, so even one for another car altogether might well work.

I suspect if it runs but runs flat out then either the accelerator pot or cabling is shorted or the ECU is. He could try disconnecting the pot or harness to test.

Hi Will

PM sent.
I get his engine racing symptoms on one of my late 2.5's when I fit an early ECU.

John

xmexclusive wrote:Hi Will

PM sent.
I get his engine racing symptoms on one of my late 2.5's when I fit an early ECU.

John

Thanks..

I suspect the accelerator connections are on different pins, possibly deliberately to dissuade anyone from installing an early ECU to a car with MAF, which is used for EGR valve monitoring, among other uses.