problem - boost leak Code 30FF

[bart_pl]

Hi, on higher gears and full gas code 30ff comes out. I have actually read about it but in my car it just happened just installing jb4, DPs and changing seals in intake manifold. So my first idea is that it may have something connected with any wrong connection that my mechanic has done with for example manifold...
error occurs also on map 0 and had never before installing jb4 (so it is not jb4 fault)
Any ideas what I should check first? Charge pipe, sealing at intake manifold? Does wrong DPs connection to the turbos may also have impac?

[edisapimp]

30FF is underboost. Could be a vacuum leak or a true boost leak from a coupler or connection. Re-check all of your piping connections, especially from turbo > intercooler hot side, and intercooler > charge pipe cold side. Check all of your vacuum lines, they tend to frey and crack. Ensure that the V-band clamps are not impeding on the actuation of the wastegate control arms.

If all else fails this could be a sign of a failing wastegate/solenoid. Do you feel any marked decrease in power? Do you have any wastegate rattle?

[mike@x-ph.com]

Do you get any other codes ?
If not, check for boost leaks.

[bart_pl]

Originally Posted by edisapimp

If all else fails this could be a sign of a failing wastegate/solenoid. Do you feel any marked decrease in power? Do you have any wastegate rattle?

There is no decrease in power, no wastgate rattle


Other codes that came out:
2D18 manipulation cover, maximum air mass
2AAF Fuel pump, plausibility
But these 2 i had before


For me it is strange that all this started with changing into DPs, jb4 and intake manifold sealing change...

[bart_pl]

Originally Posted by edisapimp

30FF is underboost. Could be a vacuum leak or a true boost leak from a coupler or connection. Re-check all of your piping connections, especially from turbo > intercooler hot side, and intercooler > charge pipe cold side. Check all of your vacuum lines, they tend to frey and crack. Ensure that the V-band clamps are not impeding on the actuation of the wastegate control arms.

If all else fails this could be a sign of a failing wastegate/solenoid. Do you feel any marked decrease in power? Do you have any wastegate rattle?

I have checked all connections, vacuum lines and v-band clamps (visual + checking with about 4rpm by hand if feel anything - is it enough check?)

There is everything ok. Where else I can look for leak?

[nacaruh]

Originally Posted by bart_pl

I have checked all connections, vacuum lines and v-band clamps (visual + checking with about 4rpm by hand if feel anything - is it enough check?)

There is everything ok. Where else I can look for leak?

http://www.n54tech.com/forums/showthread.php?t=13114

Follow this guide. It will give you a better idea of what the cause can be.

[fboutlaw]

Had this code for a year. Went through the above guide without all the tools, just visual inspection. Turned out to be missing a gasket on my FMIC cold side. Replaced with a fresh o-ring and code is gone.

You really have to be diligent and check everything.

[Solo_M_Tech]

Originally Posted by fboutlaw

Had this code for a year. Went through the above guide without all the tools, just visual inspection. Turned out to be missing a gasket on my FMIC cold side. Replaced with a fresh o-ring and code is gone.

You really have to be diligent and check everything.

A year? I would have tore everything apart after 2 hours..... Glad you got it fixed.

[Traf]

I have the same problem, even tho logs show boost on target... I'm a bit puzzled.

[MDMA 135i]

I had 30FF+limp mode when go woot, i changed all vacuum lines with new silicone one, but i fixed problem when i changed boost selenoids 11747626350 !

[bart_pl]

Is 30FF error a problem of Vanos selenoids or pressure converter selenoids (11747626350) which one should I change?