Maximum charge pressure exceeded

[jimbogrey]

I have now swapped my N75 valve and seem to be getting more consistent power (heat soaking excepted). However I am still getting max charge pressure exceeded. I spoke with Peterdb (I think) at the Wednesday meet in Windsor and mentioned this and seemed to think that this was a common problem on chipped S4's.

I am also running Forge DV's and they seem to be OK however i have experimented with mounting them both ways after reading some info on here. What I have found is that if you mount them vertically, with boost pressure hitting the bottom of the piston, they open very quickly, but close very slowly thus giving hesitation. I guess if you were to buy the tuning kit you could install a stronger spring and solve the problem.

I like others am beginning to think that there is no point in the forge items other that durability. If so with the OEM versions being so cheap (relatively) and so long as you either check or replace them regularly, you will be fine. Therefore I am thinking of changing back/

Any other opinions?

Jimbo

[ChipHazzard]

I have just run a check on my codes as well and have found this code as well

17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-10 - - - Intermittent

I have cleared it and going to nip out for a spin to see if it comes back. Any suggestions as far as I'm aware the car is still standard, I am looking to do the 710's and possibly the n75 depending what people suggest

[ronaldmacdonald]

I replaced the stock dv's with 710ns and also replaced the n75 along with a few other vacuum hoses and manged to get rid of this max charge pressure exceeded code for a fair while, however its back now. All the hoses look good so I suspect a split or tear at a join or maybe an overtightened clamp. I figure the only way to be sure now is to get a proper pressure test done by a garage with the know and kit - just got to find the time to get it sorted..

[flashyg]

keep working on as this has also been my nemesis for a year or so.

Will keep you posted if I can resolve it.
G

[Morpheous]

Where is S2T when you need him ??