Hi, my 90 model 760gle b280f engined car is driving me nuts! It has an irregular miss which is throughout the rev range and not load related, does it at idle, same at full noise. Sometimes it runs pig rich on startup, sometimes fine. Usually within about a minute of starting it gets really boggy to the point it will barely move. This clears up but occasionally presents itself at random again. Also when it is hot and has run for a while the idle starts to fluctuate wildly between over 2000rpm to 0 (it will stop the engine) which carries over into throttle so its not just an idle issue. This is awful in traffic.

Engine has been rebuilt, replaced crank angle sensor, coolant sensor, knock sensors, maf sensor, plugs, leads, cap, rotor, fuel pressure reg.

I made up the test light for lh2.2 and it blinks wildly with no apparent pause.

Any ideas?