Boost problem?

[ShaneVRS]

Hiya i had my car remapped when i had it and ive only just noticed when i give it some the PSI drops for a split second? and picks up again? any idea what it could be?

thanks

[ShaneVRS]

bump

[jim16v]

could be faulty n75 valve or a worn out dv

[stig1]

lag my friend

[urbanfox]

Shouldnt really get "lag" (boost threshold) on a K03s, besides, the boost wouldnt decrease like that as you're increasing the pressure as you apply throttle. sounds like a faulty valve of sorts.

to the OP - why not speak to the company who mapped your car for you?

[ShaneVRS]

so i need a new DV to start with and a N75 valve...

after best going for a high PSI wastegate?

[Rob_OctaviavRS]

Forge 007p recirc dump valve and a new N75 (F) valve, make sure you get the OEM version on the valve which has the F code in the part number, some people have had spiking issues and other things with the J and H valves, mines been remapped and I was advised to use the N75 F as mine was knackered, my god what a difference with the new one!

[ShaneVRS]

So them are the 2 things i should try first? and go from there?

Also another question

Its getting very noisey from front end when i lock over a tiny bit(while driving) and just generally noisey?

i have done the Strut mount and anti roll bar link on one side

[Rob_OctaviavRS]

Yeah try the N75 and 007p recirc first, they are a must if its been remapped, N75's are notoriously crap and often fail, I've had it happen on two vRS's now.

As for the noise, it is a whine or a bang/clunk when you lock the wheels over?

[ShaneVRS]

bang and clank noisys mate?

Thanks for you help btw mate

[SNH]

Could be a dry cv joint if it only happens when turning.

[Rob_OctaviavRS]

No probs, could be bushes or CV joint if its a banging on lock. More likely to be a bush, the droplinks can be weak as well, had to do them on the wifes Golf Mk4. Just have a poke about with a pry bar and check for excessive play in the bushes, or if you're not comfortable with that, take it to a decent garage if you know of one and get them to have a look for you.

[ShaneVRS]

ye its banging when you lock it over slighty and just when you go over bumps and that

[urbanfox]

So you arent going to ask the company who mapped it?

[Guest westallc]

you need to do logs with vag com to see whats happening with boost etc

too many people go out and just say buy this vavle buy that valve lol why they might be fine and then you have waisted your money!!!!!!!!!

vagcom has 99% of the answers if used correctly

[sparky2]

:S Which channels would I need to monitor with VCDS as I think my Scout is acting up ? cheers - Stuart

[ShaneVRS]

I wil try vagcom 2mra and post graph. . I hope I cn use it lol

[Chris B]

ye its banging when you lock it over slighty and just when you go over bumps and that

Broke Spring? Edited 30 October, 2010 by Chris B