Hi all need some help on my old 760GLE auto V6!
On start up engine is fine, in under a minute theres a lumpy-ness
like a missfire that begins. car drives fine and no water /oil loss,
or real difference in fuel economy but failed the MOT on emissions!
I've changed so far
lugs, leads, cap, rotor arm, even tried from my spares collection a different Air Mass meter and ECU with no joy..
I've had a compression test done which is also fine????
unplugged most sensors and injectors which dont seem to change it?
Pretty sure its electrical and must be heat related.???
Any idea's?
It's a good old bus and really to good to scrap!
Cheers
Mark
760 GLE Auto V6 - 1990