Another boost related question

[Sharky_82]

Had trouble with my car not boosting but all is sorted -

however, whenever i floor it in first gear(get some torque steer) sometimes it will only go as far as 10 psi then if i ease off and progessively come off then on again it will got to about16psi.

if i hit 10 psi and then go in to second gear it will again work fine and hit around 16psi -

Happends intermittently so not concerned but just a little confused as to why its abit hesitant -

no error codes -

 

[chris999]

maybe n75, as i have no engine management light on but still having boost problems, dan payne is selling a 2nd n75c for£15 try that?

 

[Sharky_82]

n75 is new as is maf -

thanks

 

[ChrisCurzon]

is it not just your TCS kicking in mine seems to do this some time but when turn TCS off boosts full but just with lots of wheel spin.

 

[chris999]

it isn't a n75j valve is it?

 

[Sharky_82]

nope not the J - but Boris has a good point - will give it a go today - probably is that soo feeling a little silly if it is...

cheers guy!

 

[gavthelad]

how did you get on with this?? ive never had this problem with my car (touch wood) but.......i notice the TCS light flashing before any crazy wheelspin so i doubt it will be the traction control.....mines seems to boost all the way hard before the traction controls actually starts to kill power.

I would suggest the N75.....

 

[ttothec]

ive been wondering about a similar point recently... ive got revo stg 1, miltek cat back, jetex panel filter and 007... and ive replaced all the vacuum hoses

when i floor it i get boost as follows in each gear:
1st gear: 10-12psi
2nd gear: 13-14psi
3rd gear: 14-16 psi
4th gear:15-19psi
5th gear: 16-19psi... but a few times it has gone right round to 20-21psi... but only ever in 5th

this lead me to think that its not a leak... as it would never go to 20-21psi, but i checked anyway and found nothing

could this be the n75?? ive never changed it... so assume its a standard one (not sure what that is... j etc...)... could i need a new one??

any thoughts???

 

[Sharky_82]

do you know any one with vag com as i scanned for errors and havnt got any (touch wood) so can only assume its supposed to be like that -

but im seeing a simular increase higher up the gears i go as i get nothing but smell of burning tyres if i floor it to hard.

 

[stevegti6]

ive been wondering about a similar point recently... ive got revo stg 1, miltek cat back, jetex panel filter and 007... and ive replaced all the vacuum hoses

when i floor it i get boost as follows in each gear:
1st gear: 10-12psi
2nd gear: 13-14psi
3rd gear: 14-16 psi
4th gear:15-19psi
5th gear: 16-19psi... but a few times it has gone right round to 20-21psi... but only ever in 5th

this lead me to think that its not a leak... as it would never go to 20-21psi, but i checked anyway and found nothing

could this be the n75?? ive never changed it... so assume its a standard one (not sure what that is... j etc...)... could i need a new one??

any thoughts???

i have the same problem if you find the cause let me know

 

[PhilW]

Sticky dump valve? Needs servicing?

 

[ttothec]

mine seems to boost better now, reaches 20-21psi more frequently, after i did an ecu reset... not sure if this actually made a difference or just coincidence, but worth a try