Part 1: Article by: RAkhmedov Applies to: All models with the M20/M30 straight six engine. The M30 engine uses an AFM unit to provide information to the computer about the amount of air that enters the intake. The unit uses a flap reinforced by a spring that continually presses the […]

Idle performance and EVAP Purge Valve Article by: RAkhmedov Applies to: All models with the M30 straight six engine. Erratic idle performance of the engine is often attributed to quality of ignition components, Idle Control Valve, AFM sensor, Throttle Position Sensor, etc. A part of fuel injection system that is often ignored is Evaporative Purge […]

Article by: Jon Evans Applies to all M30 engines. Oil leaking from the front of your M30 engine is a fairly common complaint, as I found when I posted an enquiry to The UK E32 Register Forum. I was prepared to book it in to have the timing cover gasket […]

Article by: Johan Article applies to: all e32 and e34 models. Problem: The fuel gauge on my car was erratic in the last 40 liters. The last 20 where the worst. The needle would fall from 20 liters to 0 and go back up to 20 in 2 to 3 […]

Article by: Sean Applies to: all e32 and e34 models. The six cylinder has one pump, the eight and twelve cylinder models have two pumps. This procedure describes the V12 pump replacement, but I6 is basically the same. Problem: One nice day, just when I thought I had driven about […]

Article by: Johan Article applies to: all BMW models with a viscous clutch cooling fan. Problem: It’s very easy to spot a bad fan coupling. The engine temperature will rise when standing in traffic. On my 735i it went to about the 3/4 mark. Apparently the electrical fan on the […]