Need some help car playing up

[ian007miles]

Hi everyone right I need some help just went for a quick blast and at first it run fine and then when I put my foot down it picked up nice and fast and then as sone as I let off the accelerator to change gear and then put my foot back on the accelerator and it was as if there was no boost, so I slowed down and then I booted it again and then the same thing happened, so I went home and checked all the boost pipes and intercooler pipes and there doesn't seem to be any leaks, and the other  thing that I thought was a bit wierd when the car was driving normal the turbo and dump valve is loud And when the boost drops it's realy quiet. Does any one no what can be causing it  could it be the n75 valve? Thanx ian

[northeast_gti-t]

you best off firstly in getting it scanned with vag com to see if your showing any fault codes and then it'l give you an idea where to look

[ian007miles]

Yer mate I no but finding any one near me with vagcom seems to be coming up a blank just have to pay a garage I think 

[northeast_gti-t]

Yer mate I no but finding any one near me with vagcom seems to be coming up a blank just have to pay a garage I think 

if thats the case it may be worth giving chris (topher) a call at r-tech am sure he'd be able to help you out 

[ian007miles]

U never no he might reply to this post .

[northeast_gti-t]

U never no he might reply to this post .

he pops on ocassionally so may do maybe worth sending chris a pm also  give r-tech a call to

[ian007miles]

I foned r- tech earlyer and they said check the new intercooler and all the pipes but by the time I done all that it was to late to ring them back so going to try them again in the morning see what they say

[northeast_gti-t]

post back and let us know how you get on 

[topher]

I was sat next to ben when you called, i was relaying the info to him. Which intercooler kit have you put on? My money is still on a leak in the intercooler somewhere. Double check that you've put the pipes on the n75 the right way round (bottom in TIP, boost feed from charge pipe to in the side, control to actuator on the top).
Sounds a bit like it's detected the leak and thrown you in limp mode. The noise you can hear is probably the boost being thrown down the exhaust.. but you will probably notice a change in the noises anyway from changing the intercooler pipework.

[ian007miles]

thanx for the reply chris (topher). its one of the ones off of ebay (£195) the same one my mate has on his blue mk4 with the k04 turbo on it. and all the pipes are fitted  nice and tight and put back were they were taken off from. is there any way of testing the intercooler for leaks? and the other thing is would it stay in limp mode untill i switched the key off or just untill the ecu stops detecting the problem? because all i did early is slow down and then it went back to normal