smeaton Posted August 25, 2005 Report Share Posted August 25, 2005 Hi people, this is my first post. I recently have had my gti tunned to 192bhp, it was running top but then has faded and the proper power only comes on occasionally especially when the car is cold in the morning! I have tested the coil packs, reset the ecu but the problem still persists, my next check is the maf! Before i go and spend the money can anyone tell me if this sounds like the source of the problem? A parts dealer said i can buy the inner part(electrical) of the maf rather than the whole thing, is this ok? Really appreciate anyone's help or opinion. Thank you, Nick.S. Link to comment Share on other sites More sharing options...
shao_khan Posted August 25, 2005 Report Share Posted August 25, 2005 Welcome to tyresmoke. Our resident techs tend to get on the boards in the evenings, so please be patient, have a look round the rest of the forums while you wait and an answer should arrive It is often advise that you can disconnect the MAF and have a drive - if the performance is the same with it disconencted then it would indicate that the MAF is at fault. Link to comment Share on other sites More sharing options...
mulkbear Posted August 25, 2005 Report Share Posted August 25, 2005 What Spec/Age/Engine/miles? If it is a Mk 4 Gti 1.8T i would suspect the coolant temp sensor, if the sensor is black then it is very old, if it is green the it is new-ish. Located under the engine cover (see red arrow) Link to comment Share on other sites More sharing options...
smeaton Posted August 25, 2005 Author Report Share Posted August 25, 2005 Thanks for the help, its mk4 gti, 1.8T, 2000, 68k. The power will just improve but still a stutter in the turbo boost at about 3000rpm. Cheers Nick. Link to comment Share on other sites More sharing options...
mulkbear Posted August 25, 2005 Report Share Posted August 25, 2005 sound like a Air mass meter, When a VAG Petrol engine air mass meter is knacked it can cause a light misfire at "boost on" time. Link to comment Share on other sites More sharing options...
Tobes49 Posted August 25, 2005 Report Share Posted August 25, 2005 [ QUOTE ] What Spec/Age/Engine/miles? If it is a Mk 4 Gti 1.8T i would suspect the coolant temp sensor, if the sensor is black then it is very old, if it is green the it is new-ish. [/ QUOTE ] Sound like the MAF it located just to the right and up a bit from the arrow, If fine to just replace the inner part as the outer bit is just a placstic shell Link to comment Share on other sites More sharing options...
smeaton Posted August 26, 2005 Author Report Share Posted August 26, 2005 Guys thanks for your help! Disconnected the MAF last night and took her for a spin and there was no difference so looks very much like its the MAF. Will order one today and let you know how i get on. Thanks again, Nick.S. Link to comment Share on other sites More sharing options...
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