Tastyterrier
Monkey Trainer
I've had an intermittent acceleration hesitation fault recently and I hope maybe one of you guys can shed some light on it.
It occurs when I've been sat in gear for a while or sometimes when I change down. The best way to describe it is as if the turbo has shut down, I'm still accelerating but with no boost. If I come off the accelerator, wait a few seconds then try again, the power is back. Also if I change up the power comes back, but not if I change down.
I've gone through the obvious: New coilpacks all round, new after market DV ( I now have a fully function Turbosmart DV going spare!), MAF sensor (disengaged and the fault still occurs), TB clean and alignment and accelerator pedal sensor reset. There's also no leaks as far as I can see.
The last port of call has to be the N249 valve, I guess there's a possibility that as I'm remapped with an N75J, there could be a boost spike issue that the N249 is trying to solve, but it doesn't explain why it's intermittent and the car isn't going into limp mode. Do these valves have a habit of going wrong? Is it just a case of cleaning them? I know you can do a bypass of this valve, but as it's effectively stopping the car from over boosting, it's a safety feature I want to maintain. Especially as it's remapped with the N75J.
When the fault doesn't occur, the car pulls hard and smooth through the rev range. It idles well and is drinking a normal amount of fuel.
I don't have access to VAG-com right now as the laptop has packed up, so I hope one of you guys can suggest something solve it from this description :icon_thumright:
It occurs when I've been sat in gear for a while or sometimes when I change down. The best way to describe it is as if the turbo has shut down, I'm still accelerating but with no boost. If I come off the accelerator, wait a few seconds then try again, the power is back. Also if I change up the power comes back, but not if I change down.
I've gone through the obvious: New coilpacks all round, new after market DV ( I now have a fully function Turbosmart DV going spare!), MAF sensor (disengaged and the fault still occurs), TB clean and alignment and accelerator pedal sensor reset. There's also no leaks as far as I can see.
The last port of call has to be the N249 valve, I guess there's a possibility that as I'm remapped with an N75J, there could be a boost spike issue that the N249 is trying to solve, but it doesn't explain why it's intermittent and the car isn't going into limp mode. Do these valves have a habit of going wrong? Is it just a case of cleaning them? I know you can do a bypass of this valve, but as it's effectively stopping the car from over boosting, it's a safety feature I want to maintain. Especially as it's remapped with the N75J.
When the fault doesn't occur, the car pulls hard and smooth through the rev range. It idles well and is drinking a normal amount of fuel.
I don't have access to VAG-com right now as the laptop has packed up, so I hope one of you guys can suggest something solve it from this description :icon_thumright: