Boost kicks in about 5k rpm

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spence

Member +
I found out today after going for a long boring drive that i do have boost but it doesn't kick it till about 5000 rpm when before it use to kick in about 3000 rpm.

I have recently fitted a front mount intercooler and since after i fitted it i haven't had boost, or so i thought, is there any way i can change when the boost kicks in back to about 3000rpm and not 5000 rpm??
 
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GI BOY

Member +
Sounds like a boost leak in your cause a intercooler leak check the clamps or clips you have on it? What turbo you running? Did u upgrade turbo?
 
S

spence

Member +
GI BOY said:
Sounds like a boost leak in your cause a intercooler leak check the clamps or clips you have on it? What turbo you running? Did u upgrade turbo?
Click to expand...

I've checked all the clamps and they are nice and tight, it's still the standard ct9 turbo, I don't understand hy cause it was boosting about 3500 rpm before I fitted th intercooler.
 
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Skalabala

Member +
If its not a leak it could be that the waste gate is faulty and even the area around the waste gate seal could be badly cracked/burned through.
You could also have a bad exhaust leak.
The turbo could also be bad. Check the shaft play on it :)
And as tripple j said.
 
S

spence

Member +
Skalabala said:
If its not a leak it could be that the waste gate is faulty and even the area around the waste gate seal could be badly cracked/burned through.
You could also have a bad exhaust leak.
The turbo could also be bad. Check the shaft play on it :)
And as tripple j said.
Click to expand...

Right, now I'm going to sound dumb, which part is the wastegate? lol as I'll check those bits on the weekend when I have more time to do it.

Cheers for the reply guys
 
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Skalabala

Member +
These are actuators. There is a pipe attached to it that controls the diaphragm inside the actuator, the diaphragm can go bad (or the spring inside can go bad)<-- problem
30042009179.jpg

Cracks, only when they are way worse than these it will do what you are experiencing
WastegateCrack.jpg

Severe shaft play
http://www.youtube.com/watch?v=neaGPruI7H0

How much boost do you have at 5000rpm?
 
S

spence

Member +
Skalabala said:
These are actuators. There is a pipe attached to it that controls the diaphragm inside the actuator, the diaphragm can go bad (or the spring inside can go bad)<-- problem
30042009179.jpg

Cracks, only when they are way worse than these it will do what you are experiencing
WastegateCrack.jpg

Severe shaft play
http://www.youtube.com/watch?v=neaGPruI7H0

How much boost do you have at 5000rpm?
Click to expand...

I don't have much, I don't have a boost gauge so not sure on the pressure of it but you can feel a very little amount of boost, not near as much as what it was
 
S

Skalabala

Member +
Then you might have a timing problem or a fubar turbo.
If its a boost leak then the boost sound will be harder than normal.
 
S

spence

Member +
Skalabala said:
Then you might have a timing problem or a fubar turbo.
If its a boost leak then the boost sound will be harder than normal.
Click to expand...

Hopefully its a little boost leak in the intercooler..... And hopefully i can patch it up qucikly and cheaply

wildchild said:
did u use a used fmic or new one? cores could be blocked..
Click to expand...

Yeah i bought it of a chap of here (snails p91) that breaks Glanza's for parts
 
Last edited:
wildchild

wildchild

Member +
spence said:
Aye, looks like I'm going to have to borrow my mums hair drier to test it for leaks then lol
Click to expand...

easier method is to cover one end and pour water through the other. or else submerge the cooler in water and blow air thru the open side (inlet) making sure it doesnt leak at the inlet.
 
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