Bimmer Owners Club

Great tip, thanks for posting it 🙂

Hi ... welcome to the Forum Sounds like a vacuum hose leak to me....that would explain the hunting revs. Check for any hissing under the bonnet and you could use a smoke generator or a solvent to diagnose where the leak is. Let us know how you get on with it Cheers, Trevor

I always found the best method for increased MPG is the close monitoring of the right foot extension 🙂 Also, keeping the car in tip-top condition with maintenance and also premium fuel (e.g. branded not supermarket) which is mostly around the same price nowadays

My Z3 Vanos seals have gone past their sell-by date....it is a 2.0 litre M52 engine with twin Vanos. The symptoms are: Poor idle and staliing Lack of performance Popping from the exhaust on overrun Poor Economy The seal kit to replace the originals are around £25 and I have the kit and intend to fit shortly (will post up a guide when I tackle the job) The original seals weren't up to the heat and oil contamination hence the new ones are much improved. Another factor to consider is that the Vanos relies on oil pressure to operate and if the oil quality is poor and the filter is partially blocked then the Vanos does not function as it should do.

Here's a guide if you want to carry out a refurb yourself....cheaper option in the long run https://autoevoke.com/index.php?/forums/topic/869-painting-brake-calipersdrums-guide/&tab=comments#comment-882

Just thinking that if you've cut everything out of the car then I would be tempted to wire the fuel pump directly through a cut off switch and even if it is drawing power then you can switch it out completely