Gti wont run after new Maf fitted?

[austengti]

Having a bit of a nightmare with my gti at the moment.....

I was fixing an intercooler pipe leak and cleaning my airbox/filter last weekend, all went well, drove my car out of the garage and left it, went to drive it a couple of hours later and it was running horrendously lumpy and as soon as you put the throttle down it would just cut out. I discovered if I unplugged the Maf sensor it would idle fine and run but it was just in what i guess to be limp mode as it was just dumping the boost out and wouldn't take throttle at all, but at least i could get it home. I then plugged it in to my mates Vagcom and as suspected it came up air flow sensor... So i got a new maf from my local vw, fitted it tonight and its the exact same still?

Do i need to plug it back in to wipe any codes before it'll take the new sensor? or any ideas what it could be? 

Any help is appreciated!

cheers, Austen 

[davep84gti]

try disconnecting the battery for an hour or so and then reconnect.

[DDM]

Having a bit of a nightmare with my gti at the moment.....

I was fixing an intercooler pipe leak and cleaning my airbox/filter last weekend, all went well, drove my car out of the garage and left it, went to drive it a couple of hours later and it was running horrendously lumpy and as soon as you put the throttle down it would just cut out. I discovered if I unplugged the Maf sensor it would idle fine and run but it was just in what i guess to be limp mode as it was just dumping the boost out and wouldn't take throttle at all, but at least i could get it home. I then plugged it in to my mates Vagcom and as suspected it came up air flow sensor... So i got a new maf from my local vw, fitted it tonight and its the exact same still?

Do i need to plug it back in to wipe any codes before it'll take the new sensor? or any ideas what it could be? 

Any help is appreciated!

cheers, Austen 

just had this with a audi s3, it turned out to be the  boost solenoid mounted in the intercooler pipe. the boost solenoid sensor and the fuel pressure sensor and the temp sensor faults can all point to the maf, when it's not this at fault. you cannot use non genuine parts neither, I sourced a genuine bosch sensor through euro car parts for a lot less than vw.

[mdmay]

Check to see that you have no air leaks post maf.