Loss of power high RPM

[scotty_24]

Hi Everyone

So my car seems to have developed anti lag ha ha.

Full throttle it feels like im hitting a brick was anything 4k rpm onwards, miss fires and pops and bangs through the exhaust.

Codes :
16684 Random Missfire detected
16685 Cyl 1 Missfire detected.


Tried a new coil pack in cyl 1 and still no good.
Find under partial throttle, only happens under load.
Spark plugs NGKBKR7EIX brand new 2k miles ago.

When I unplug the MAF it drives much better.

Do I try a new MAF? Unfortunatley I cant try a known working one as all the lads I know with 1.8T have ko3 based turbos and have a smaller MAF.

This car will be the end of me.

Thanks in advance.

Scotty

 

[VAG-Slag]

try unplugging the MAF and going for a drive, if it's any better then this could be your culprit...

It sounds reminiscent of a lean misfire to me though. . . What fuel pump are you running?

 

[<tuffty/>]

You can try the sensor if your car is wideband and the K03 cars are wideband too... the AMK/BAM MAF sensor is the same as AUM A3's... its just the MAF tube thats a different size

You will need a 5 point TS25 bit to remove it though or some have modded a flat blade screwdriver by filing a slot in the centre of the blade

<tuffty/>

 

[scotty_24]

The fuel pump is Brand new OEM last year. Could be under stress though? Mybe an inline fuel pump needed?
I unplugged the MAF and it drove much better, I would say about 80-90%

 

[scotty_24]

Bump anyone able to help?
Unplugged the MAF and seems much better but don't want to drive around with it unplugged

Fluctuating idle, hitting a brick wall at 5k RPM sound like symptoms of a bad MAF?

 

[Erikn89nl]

Wouldn't happen to be a collapsing TIP?

 

[scotty_24]

Nah dude Im Badger5'd

 

[scotty_24]

New MAF today, Missfire sorted and no more bogging down or feeling like I've hit a brick wall at high RPM.
Just I case anyone reads this thread in future it may help