Map sensor check

TimmyTurner · **Joined:** Mon Mar 27, 2017 10:34 pm **Posts:** 21

I would.

I'd also check my air filter, and maybe replace my fuel filter if its been a while.

Poor fuel mileage is usually caused by one of those (notwithstanding tire-pressure, a lead foot, and crappy fuel).

WWDiesel · **Posted:** Thu Mar 30, 2017 9:50 am

A small boost leak, i.e. hose leak, cracked charge air cooler, etc... can impact fuel milage greatly! :roll:

Also sticking variable vanes on the turbo or issues with the variable vane controls can also cause poor fuel milage!

FYI, there no learning process required for a new MAP sensor. The OBC simply takes the output data from the MAP and uses that information to control various engine functions! :wink:

joohn · **Posted:** Thu Mar 30, 2017 3:23 pm

what about the first part of my post, the over boost has gone is it due to the long (8 x 220 miles trips) on cruse control could it moved the rubbish from the turbo vain's is this possible? I will soon be making a trip of 600 miles I have dome many times so can compare the mpg indicated and I will report back.

Map sensor check

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