Boost Problem.. Limp Mode :(

[LeeroyBrown]

If i turn revo off its runs perfect hits 7-8psi.. Turn revo back on and it only hits 10psi and after driving for abit it goes into limp mode and then only hits 5psi...
I have changed the plugs, coils, MAF, N75 and i still have the same problem.. I am now thinking it is something to do with revo itsself is that possible??? I dont have VAGCOM

 

[Saul]

which n75 have you put on? j or f?

checked your dv or any of the hoses for leaks?

 

[LeeroyBrown]

I actually got the C on it coz it was mapped with that.. I have tried putting an F on it and its just worst... Cant see any leaks atall, just seems weird how it runs perfect with revo off, and as soon as i turn it back on it mess`up.. Which makes me think its something to do with revo? or the ecu, but then again im prob wrong lol....

 

[Saul]

i very much doubt its software based

will have a search and see what comes up

you ideally need to get it logged/scanned with vag com though

 

[H8T WP]

fuel pressure sensor?

 

[PhilW]

Get vag com and stop guessing and possibly wasting your money.

 

[Revo Kev]

Collapsing hose?
N249?
Sticking DV?
Wastegate?
Intercooler leak under load?

If the software has been on there with the car functioning correctly then it definatley can't be the software though!

 

[Revo Kev]

Phil has a fair point
Check the error codes and possibly datalog certain sensors to get an accurate assessment of what's up!

 

[LeeroyBrown]

Iv finally got vagcom.. Gonna have a play with it tomorrow and ill upload the codes i get for you guys to have a look at