Boost Guage Wrong Reading

[overd0se]

ive got an autometer boost guage.

and was hitting around 9-10psi for a few weeks after it went in for a service/dyno and now for some weird reason its only going to 5-6. i dont have any external controllers to test that my guage is out of wak.

car has fmc, pod , cat back exhaust got dynod and made 140rwkw but came up with "needs clutch".

maybe the clutch is on its last legs and isnt holding boost though the car doesnt feel slower.

(paranoid)

-paul

[readyGO]

Maybe they turned your boost down because at 10psi it was going to eat it up very quickly??

[overd0se]

it had the same reading before/after i brang it in only started happening past 2weeks i checked the cooler piping & the vac line. but i cant seem to see shit

[Munkyb0y]

if the car doesnt feel any slower, and boost feels the same. i'd say borrow another boost guage. urs might be playing up. also check the line to ur gauge isnt kinked or leaking.

[mad082]

if the clutch is slipping then that could be part of the reason why it isn't boosting up. if you sit in the car and rev it in neutral it doesn't boost up because there is no load. if the clutch is slipping then it isn't loading up as much as it should, but it would have to be slipping quite alot.

[mad082]

it could also be that the turbo is on the way out and is starting to lose its exhaust wheel.

[WazR32GTSt]

you don't "start to lose exhaust wheel" unfortunately. its either on there or it isn't!

most likely options are:

- kink in hose going to gauge

- faulty boost gauge

- clutch slipping so that you can't generate enough load to gnerate boost

option 3 would require your clutch to be pretty much farked and you would feel this while driving

i'm leaning to option 2

what does the stock boost gauge say?

how does it feel compared to before the dyno tune?

cheers,

Warren

[overd0se]

to be honest the car runs well feel better since the tune.

ive had the guage for over 8months never had a problem.

got the car serviced about a month ago n last 2weeks it was giving me a 5-6 reading

compared to the usual 9-10.

you don't "start to lose exhaust wheel" unfortunately. its either on there or it isn't!

most likely options are:

- kink in hose going to gauge

- faulty boost gauge

- clutch slipping so that you can't generate enough load to gnerate boost

option 3 would require your clutch to be pretty much farked and you would feel this while driving

i'm leaning to option 2

what does the stock boost gauge say?

how does it feel compared to before the dyno tune?

cheers,

Warren

[overd0se]

booted it this morning onto the ringroad n it went up 2 8pound in 2nd gear then from 3rd it went to 5pound n when i was taping guage it went 2 six weird guage

[mad082]

take the gauge out and take it to a bike shop and get them to hook up a pump to it and pump some air into it and see what it does.

and you can "start to lose your exhaust wheel". you can get chips in the blades.

[WazR32GTSt]

"losing your exhaust wheel" = the blades separate from the shaft as they are ceramic glued onto a steel shaft...

how do the blades get chipped? something would have to go through the engine for the blades to get chipped... unlikely to happen on the exhaust side

ither the wheel is attached to the shaft, or its not. ask those who have blown a turbo.. one second they wre booting it, the next second they have no boost.. there's no warning signs or symptoms...