No... (archive)

I leave mine parked outside (no garage) and I can go out and fire it up after sitting for a week at 20-40F temps. All I've done in the last 10k miles is Techron, spark plugs, and drive it *hard*, escpecially if it's for short trips. This gets the engine and oil hot and reducess carbon build up.

What sort of maintenance have you done on your M5 in the last year? Plugs, wires, filters, cap, rotor, injector cleaning, coolant temp sender, ECU chip, fuel pressure regulator, vacuum hoses, etc?
You can eliminate the O2 sensor, because the ECU ignores it until the temp comes up.

What mods do you have?

Let's see if we can solve this one.

I'm fortunate that mine runs like a champ nearly 100% of the time. I DO have a problem with certain brands of gas (Exxon, Sheetz, Citgo, cheap stuff) and the #5 injector sticking shut on cold start. Not fun, but a few taps gets it firing again. I am going to replace the injectors and have the old ones cleaned/blueprinted at RC Engineering. They are the same for the E30 M3, so I'm going to send those off also once I have my spare set.

JamesM

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