Rover 45 Derv Ron Box

[Steves Cleenz]

below that, couldnt remember where they boost from, just stops it being really sluggist at low revs and helps it rev to the red line as when the Air flow meter is going it wont rev past 4k i think it is

[peterzs]

I think it only corrects the MAF sensor, if it is on the way out, it fools the engine to think its running right.

You have to adjust the box to give you the right running, in the lowest position you can, I just set mine up and left it.