Whats this for?

[ALAN01]

While changing a fuse today, noticed a black knob with a direction arrow on the side of the ECU, Tempted to turn it but thought better, any ideas?

Alan

[wedg1e]

Sounds like the fuel enrichment mod that some cars have: turn it and see

Ian

[ALAN01]

Thanks Ian

[bhardy]

I agree with Ian as i've seen a few ECU's like that