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2004 E46 320td - maf sensor / map sensor

2K views 7 replies 2 participants last post by  matthew_henson 
#1 · (Edited by Moderator)
maf sensor / map sensor what do they do ?
do they both need cleaning?
where are they located ?
 
#2 ·
MAF front left in front of the air filter, MAP back right on the back of the inlet manifold, both cleaned with electrical contact cleaner (don't poke anything in the MAP hole)

Swirl flaps need blanking ASAP and the engine breather (middle left next to the injectors) needs replacing for a vortex type, also would put money of the EGR thernonstat having gone
 
#4 ·
Questions question question :silly

Black thing on the square tube at the front of the engine, it is held on with 2 10mm bolts and needs to be taken off when the engine is cold (take the radiator cap off first to release pressure) then see if you can blow through it, if you can, it is dead, £32 for a new one
 
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