I posted earlier about my search for an e34 520i with m50 engine.
I found and bought one that has 260000 km on it.
The previous owner replaced the radiator, hoses, silentblocs in the rear and the MAF.
It drives real nice.
It has an LPG aspiration system which will save me tons of money at the pump. (I do about 1500 miles a month).
Something's bugging me a little though:
At starting (relatively cold or cold starts). Idle is fine at first, but after revving the first time idle can sometimes drop real low, like 400 rpm or even stall. That goes away after a few miles of driving, but even then idle is stable, but never really smooth and it looks as if the idle control valve can't decide on how far to open. So idle stable, but idle speed can vary abrubtly (never over 1K rpm).
I'm wondering now if this could be due to the throttle position sensor.
The bentley manual says the TPS is non-serviceable, but has anyone ever tried cleaning it?
I'm going to measure the resistance and voltage tomorrow at work.
Does anyone here know what else could be causing this?