Help! Boost Gauge Just Died!

[snoopy4eva]

Hi all,

I was driving home from work today and by R45 GT-T stock boost gauge just stopped working. It sits at -1. Car still works fine and I can hear the turbo at work.

I'm totally new to all this so I'm freaking out a bit. Does anyone know where I should look to see if I can fix it? If not who would be able to fix it at a reasonable price?

[Viper_r32]

sometimes this can be a simple a a small hose that has come loose. look for a small rubber hose that generally runs from the back of the inlet manifold in to usually a small black box that sits on the fire wall in the engine bay usually in line with were the boost gauge sits on the dash

[W1ngnut]

If the R34 GT-T (hehe R45, i wish :-P) has the same boost gauge setup as the R33, there is a MAP sensor on the driver side near your brake booster. This has a vacuum line going from the back of the engine manifold to it. This could have come off which will result in you being unable to read anything other than '0' (in your case -1).

^^ahh, i was beaten^^^

Edited December 9, 2008 by sfrizza

[snoopy4eva]

thanks for the really fast replies guys. trying to locate this stuff but im having trouble. where abouts exactly is the brake booster. would it help if i took a pic and u cud just point it out?

[snoopy4eva]

ok i took some pictures of what im assuming to tbe the Brake Booster. where abouts should i be looking?

[Viper_r32]

ok i took some pictures of what im assuming to tbe the Brake Booster. where abouts should i be looking?

try that area bellow the blue compliance plate, it should be some were around there, hose should be about the size of the one in the photo running parallel to the strut brace

[snoopy4eva]

ok after a crap load of poking around. i decided to take it for a drive just to test. first 10 mins, nothing. then all of a sudden it woke up. started reading pressure properly. The needle was a bit unsettled when i was waiting at the lights at first jumping around a bit but then after a while it calmed down and became normal.

any idea what could have happened? i dont want to think that its ok when it cud be something majorly wrong with the turbo/engine.

Edited December 9, 2008 by snoopy4eva

[Viper_r32]

weird, sounds like maybe it was a stuck needle. not sure, i know its not unheard off

any one else got any ideas?

[Bluprint]

Stuck needle or the boost hose that feeds the gauge might have been crimped

[snoopy4eva]

reckon i shud get it checked?

[Gus-]

i wouldn't worry about toooo much it unless it drops and your actually losing boost. remember the boost gauge is there to tell you if your maintaining the pressure you want...i reckon if you aren't making boost...you'll know. thats when you check it out.

[snoopy4eva]

no worries. i'll keep an eye on it. thanks all!

[rossco_01]

it would be better if you got an after market boost gauge anyway as it is easyer to read than the standard one and they are more acurate

[Randon_I_Am]

Hey mate i know its an old thread... But how did ya end up going with that boost guage?

i got mine doing the same thing... i'll have to look into re-soldering some components in the sender unit i think.

[NJR 34GTT]

Mine's done the same ever since I got it, never bothered too hard to fix it. Seems a pretty common fault.

[Randon_I_Am]

i done some soldering today on the sender unit... The solder joints didnt look the greatest... i'll have to wait and see how it goes