speedy8281
Member
Registered: 7th Jan 05
Location: N. Ireland
User status: Offline
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My LET corsa has been missing in 4th and 5th gear. A guy has looked at it for me and he reckons it's definately overboosting. He says the boost can't be turned down from the ecu and the turbo needs regulated? Has this happened anyone? Or have any of you any ideas on this?
Cheers
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J100RSA
Member
Registered: 4th Mar 01
Location: Thornhill, West Yorkshire
User status: Offline
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adjust the actuator
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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what is it boosting? then what is it overboosting too?
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Ben ev
Member
Registered: 23rd Oct 05
Location: kingslynn / torquay
User status: Offline
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amal valve will be shot most likely. a shaged actuator would cause it to underboost but youl need to fit a gauge and see what its doing
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speedy8281
Member
Registered: 7th Jan 05
Location: N. Ireland
User status: Offline
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wats the amal valve mate?
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Nic Barnes
Member
Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
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small cylinder shaped thing near afm with 2 vacuum pipes going to it
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speedy8281
Member
Registered: 7th Jan 05
Location: N. Ireland
User status: Offline
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is it abt 1" by 1" size? If thats it there's one pipe going to it and place fo another 2 on other end but none in them?
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Nic Barnes
Member
Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
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well there is a vac pipe coming from the actuator, and one from the turbo, they are supposed to go to that. or does it run a bleed valve?
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speedy8281
Member
Registered: 7th Jan 05
Location: N. Ireland
User status: Offline
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had a wee look there the pipe coming from the actuator goes nowhere. Would that be where my problem lies?
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Nic Barnes
Member
Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
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just hanging? it should go to the amal valve, and one off the turbo should aswell. which way round the go i cannot tell you lol as ive forgotten, mine has had no vac pipes on it for years
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speedy8281
Member
Registered: 7th Jan 05
Location: N. Ireland
User status: Offline
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on that valve at on end there is place for 1 pipe and 2 on the other. The end with one has a pipe on it which to a larger pipe that goes to rocker cover and other end down to air intake on turbo. There is a small pipe coming from the actuator and one from directly under it on the turbo these are goin to nothin?
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Nic Barnes
Member
Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
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they should be going to the amal valve
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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http://www.migweb.co.uk/gallery/showphoto.php/photo/3392
amal valve
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Nic Barnes
Member
Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
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hope that helps you
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Nic Barnes
Member
Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
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amal valve also called charge pressure bypass valve if you ever get it as a fault code.
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speedy8281
Member
Registered: 7th Jan 05
Location: N. Ireland
User status: Offline
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mate your a star. That just fixed my problem. Can't believe it was something so simple. Cheers again mate.
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