Faulty Turbo?

[trappedunderice]

i've never owned a turbo before so i was hoping someone could help me out a little..

im running a completely stock 34 gt-t and sometimes on ignition the boost gauge won't move, not even a slight fluctuation, today i was driving and the gauge had been sitting on nothing, then doing 60 it suddenly jumped to about midway up the gauge, stayed at that pressure for 10 seconds, then dropped disturbingly quickly back to 0, im not sure whether it's because i've only started looking at the boost gauge while driving that i've noticed it goes for ages without moving from 0, i can hear the whirring/spooling? sound but without gunning it, cant tell wether it's active. i had a major service (smooth garage) and immbolizer installed friday if thats relevant at all..

basically i'm dumb, is there something wrong? or is that normal behaviour? only just bought it, i'll be pissed if it's already playing up. is my best bet getting a compression test?

cheers guys

[Tommy Kaira RL]

i've never owned a turbo before so i was hoping someone could help me out a little..

im running a completely stock 34 gt-t and sometimes on ignition the boost gauge won't move, not even a slight fluctuation, today i was driving and the gauge had been sitting on nothing, then doing 60 it suddenly jumped to about midway up the gauge, stayed at that pressure for 10 seconds, then dropped disturbingly quickly back to 0, im not sure whether it's because i've only started looking at the boost gauge while driving that i've noticed it goes for ages without moving from 0, i can hear the whirring/spooling? sound but without gunning it, cant tell wether it's active. i had a major service (smooth garage) and immbolizer installed friday if thats relevant at all..

basically i'm dumb, is there something wrong? or is that normal behaviour? only just bought it, i'll be pissed if it's already playing up. is my best bet getting a compression test?

cheers guys

Sounds like your boost sender has a dry solder joint or its your guage. dosent sound like the turbo its just the electronics

[RubyRS4]

Sounds like your boost sender has a dry solder joint or its your guage. dosent sound like the turbo its just the electronics

+1

Don't panic just yet. Get the boost gauge checked out.

[dark.sky]

34's quite often have dodgey sender units dont they?

If that is indeed what it is, dont panic at all, its a 30 second fix.

BTW, to the best of my knowledge, a turbo wont intermittently boost, it either will, or wont, not both.

[trappedunderice]

34's quite often have dodgey sender units dont they?

If that is indeed what it is, dont panic at all, its a 30 second fix.

BTW, to the best of my knowledge, a turbo wont intermittently boost, it either will, or wont, not both.

thats what i thought, is there anyway i can fix this myself? i think supercheap has 60mm gauges i could grab but installing it would no doubt be a nightmare >__< gauges are half the fun of owning a turbo imo

[jrm]

I recently re-soldered the dry joints on normsta's boost sender that was doing the same thing.

If you're comfortable with a soldering iron, it's about a 15 minute job to take it out, hit it with the soldering iron and put it back in.

The other thing that normally breaks about the same time is the vacuum hose back to the plenum. It'll often crack when you try and pull the sender out to replace anyway. I'd suggest try changing the vacuum hosing and then if that doesn't fix it, look at hitting up those dry solder joints. It's the three main ones coming back to the plug. There's a thread on it somewhere if you hit up search.

[trappedunderice]

don't have the tools or knowledge by the sounds of things, i'll have to take it back to smooth garage. bye bye wages!

thankyou for your help everyone

[Blazk]

Happened to me. Check boost hose hasnt got leaks and the boost sensor hasnt got dry solder (mine did). Where abouts are you in Adel someone maybe close to help you out..or me .

[jrm]

Happened to me. Check boost hose hasnt got leaks and the boost sensor hasnt got dry solder (mine did). Where abouts are you in Adel someone maybe close to help you out..or me .

.. or me.

[dark.sky]

Its 2 bolts, a plug, and a vacuum line to get off. Right next to the brake booster, possibly the easiest thing on the car to get off

[Madaz]

yeah take it to Jenna save some money and she can show you some things about your car

[trappedunderice]

i'm in croydon, i found a tutorial about resoldering the three joins on the chip above the front right tire, scared about messing with it, it's under a three month warranty, doubtful but would that cover this?

[jrm]

yeah take it to Jenna save some money and she can show you some things about your car

uhhh .. what's a car .. I'm just a girl

i'm in croydon, i found a tutorial about resoldering the three joins on the chip above the front right tire, scared about messing with it, it's under a three month warranty, doubtful but would that cover this?

You could ask them - couldn't hurt to give it a shot.

It's pretty easy to do if you have access to a 10mm spanner to unbolt it, and a soldering iron to re-flow the three joins though

The hardest part is undoing the damn clips around the edge of the sensor, I always struggle with that bit.

[Madaz]

even if you have to buy a soldering iron it wont be the last time you use it

[trappedunderice]

even if you have to buy a soldering iron it wont be the last time you use it

no doubt, i've never soldered in my life however ahah.

[Madaz]

[trappedunderice]

to update, i've checked all the cables and the vaccum line as best i can, all in good working order by the look of things gonna try and pry open the boost control chip case and go from there.

[Damo_R34]

yep mine does exactly the same thing.

[trappedunderice]

managed to get a hold of a soldering iron but i can't seem to get the boost unit case open, i don't want to crack or break it but can't seem to find a way of getting it off

edit:

i mean the larger case just above the right wheel, not the part sitting above the engine

Edited October 18, 2010 by trappedunderice

[jrm]

How'd you go?