Hi, im getting my a3 tdi (130) mapped on monday, other than giving it a health check is there anything else i can do that may be benificial to do? Ie tyre pressure for rollers etc? Also my car needs the tracking done so pulls a little to the left will this sap a little power? Cant wait!! Bill is doing the mapping (revo) at badger5! Also ive filled the tank and have now found a can of diesel stop smoke and was considering using it although it doesnt smoke at all however would this hamper or interfere with the mapping??? Thanks. Lewis.