another ghey boost problem

[Ricardo_Smooth]

right, wasnt boosting to what it should so i reset the ecu and throttle body and it starting missing. found it to be the maf after testing all the coils to find they were all fine. so i replaced the maf (genuine bosch one) and it played ball for a while but now i'm bakc down to 5psi peak. so i tried re-setting the ecu again and it boosted up to around 8-9 peak as it should and now its back down to 5psi peak am i right in thinking the n75 is probably the other the other culprit to my lack of boost? all vac pipes are new and checked they are connected properly, the forge TIP is fitted as it should be and secured properly. plugs are new and have been checked and they are fine.

any input guys? i dont have vag-com and run a mac so getting vag com to work would be a pain in the ass! anyone near sheffield with vag com i would welcome your asisstance should it be possible for you to lend a hand

 

[p34ch3y]

how did you reset the ecu?

i take its not been maped and its std yea?

 

[Ricardo_Smooth]

yeah its std(want it right before mapping next month), took the battery off for over 10 minutes, then left the throttle body to do its thing before turning it over

 

[p34ch3y]

id go with trying a new n75 valve mate sounds like that may be playing up

have you changed it at all or has it been on there scince day 1 (the n75)

 

[Myki da Pyki]

Yep change N75 then come back to us if your still having problems

 

[Ricardo_Smooth]

right, changed the n75 and re-set the ecu again in case there were any faults in the system, and its still only boosting to 5psi, mega annoyed at it now because whilst the ecu is settling it will boost properly for a very short while and thats it so thats a brand new maf and n75 now. pleeeeease help me

 

[acidstrato]

no lights on the dash?

 

[Ricardo_Smooth]

nope,hence why i'm so confused

 

[jacko18]

no splits in the pipes? i was having problems boosting and it was because i had a hair line crack in my TIP

 

[acidstrato]

ever fiddled with the actuator?

 

[Ricardo_Smooth]

no, never touched actuator and TIP is a silicone one (all fine) gonna try n249 back to std next, all silicone pipes are new too

 

[jacko18]

mine is silicnone aswel mate thats what suprised me it had split around the base of the DV stalk.

 

[Robbie C]

VAG COM is gonna be your friend here, is there noone in the area with a copy who can help?

 

[Ricardo_Smooth]

i've got a help wanted ad up at the moment so i shall have to see who rescues me!

 

[Ricardo_Smooth]

checked the pipes for leaks and none are evident. getting stuck for ideas now. how stiff is it meant to be to move the actuator? seemed a bit 'squeeky' when moving it so i've put some wd40 on it and it seems to be moving ok. I'm open to suggestions as it seems nobody near sheffield has VAG-com available

 

[ganda_cupra]

I may be able to help you by checking your fault memory for you. Haven't got vagcom but have got access to vag diagnostic machines. If your free one in the day on a weekday or maybe this sat at somepoint. PM me if your interested. Also have a spare N75 you could try.

 

[jacko18]

where is the actuator located??

 

[freddie]

^^^^^^
left hand side of turbo

 

[Myki da Pyki]

^^^^^^
left hand side of turbo

If your looking at it tho it'l be on the right

 

[Ricardo_Smooth]

no as you are looking at it its on the left. anyone else got any suggestions? gonna free off the actuator tonight ans see if the wastegate is sticking or anything