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The idle speed is supposed to drop a little when you shift from neutral to drive or reverse. On my A3, neither the unloaded idle in neutral or the idle in drive or reverse is ever rough. It has always purred like a typical cat 4-cycle diesel.

Don't the zombies come out after the EMP renders everything unusable? That's why I bought my A3. The CTIS just pimps up the cab so I can get the chicks in my ride! It doesn't need to actually work.:razz:

Uh, what ECM? There is none. There is a mechanical high pressure fuel pump, that's all. The injector timing and metering on the CAT 3116 engine for the A3 is all mechanical and under the valve cover. There is no traditional Bosch or roosamaster metered pump like on the A2 or CUCV and...

Nope. All mechanical injection system that is classic Cat. I think that there are 3116 variants that have electronic fuel control, but they are not used for the A3 application.

Nothing on the A3 engine is electronic -thankfully!