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Author c20let boost problems
craig_s
Member

Registered: 5th Mar 06
Location: Birmingham Drives: mk4 astra gsi
User status: Offline
6th May 08 at 23:09   View User's Profile U2U Member Reply With Quote

when driving if i accelerate a bit,the boost will rise out of -vac upto 0 but won't go past that(won't go into positive boost)yet when i let off it will still dump.have i not set the actuator right?

also when idling for a while every now and then it will smoke for a few seconds then clear or if i rev the engine it clears.does it sound like the turbo selas have gone?
craig_s
Member

Registered: 5th Mar 06
Location: Birmingham Drives: mk4 astra gsi
User status: Offline
7th May 08 at 16:30   View User's Profile U2U Member Reply With Quote

Steve X16XE
Member

Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
User status: Offline
7th May 08 at 20:56   View User's Profile U2U Member Reply With Quote

Turbo seals haven't gone. Trust me, you'll know when they do. Day will turn into night
craig_s
Member

Registered: 5th Mar 06
Location: Birmingham Drives: mk4 astra gsi
User status: Offline
7th May 08 at 21:55   View User's Profile U2U Member Reply With Quote

it's pretty bad when it smokes maybe they are just on there way out?
SportBoy
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Registered: 5th Oct 01
Location: Retford, Nottinghamshire
User status: Offline
7th May 08 at 22:32   View User's Profile U2U Member Reply With Quote

sounds like turbo .. mines started doing it
C6DSY
Member

Registered: 26th Nov 05
Location: St.andrew, Fife
User status: Offline
7th May 08 at 22:40   View User's Profile U2U Member Reply With Quote

If actator is not turned up enough it will do this, also possibly an air leak some where in small pipes to dump valve or amal valve!!

Its building some boost to dump obviously
Ben ev
Member

Registered: 23rd Oct 05
Location: kingslynn / torquay
User status: Offline
7th May 08 at 23:45   View User's Profile U2U Member Reply With Quote

could be a number of things but most probibly a boost leak. what colour is the smoke?
craig_s
Member

Registered: 5th Mar 06
Location: Birmingham Drives: mk4 astra gsi
User status: Offline
8th May 08 at 16:39   View User's Profile U2U Member Reply With Quote

grey/blue.pretty sure there is no air leak's anywhere.to set the actuator i moved the arm up the bar untill the waste gate was closed then locked it off there is this the way it should be done?
C6DSY
Member

Registered: 26th Nov 05
Location: St.andrew, Fife
User status: Offline
8th May 08 at 21:30   View User's Profile U2U Member Reply With Quote

to set it properly you need to get a boost gauge and take car for a drive and put it under load, it should prbably go up to about 11psi then drop back to 9psi, sounds like yours is not getting anything like that. turn it up the bar a bit mor till it has some tension not too much tho
craig_s
Member

Registered: 5th Mar 06
Location: Birmingham Drives: mk4 astra gsi
User status: Offline
8th May 08 at 22:16   View User's Profile U2U Member Reply With Quote

got a different problem now though.got it to go just over 10psi tonight but it's not once it get's there it's not steady it fluctuates up and down you can feel it and see it on the gauge.also got a miss fire at full boost,you can hear a pop from the exhaust now and again when you have your foot to the floor

 
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