nigelpritchard

Right here we go ,my car is a 530d 2004 54 plate and the problem is when the car engine is cold the car pulls and drives like it should ,but when after i do approx 3-4 miles the car just wont pull the turbo is not boosting ,i can hear the turbo spinning but no boost it has the electronic turbo actuator fitted and not the vacume type ,the dealer said its the turbo but im not convinced becouse the turbo works fine for the first 3-4miles ,also the throttle housing makes a funny squeeling noise when i open the car and the bonnets up i can hear it (is this supposed to happen just wondering is the throttle faulty and causing the problem with the turbo???

ktlocklear

Could be the wastegate flapper is seizing in the open position once the engine warms up...if this is the case you will build no boost. How many miles are on the turbo? One way to check if the flapper is seizing is to grab a hold of the actuator arm and see if you can manually slide the wastegate flapper open....should have tension, and slide smoothly.

craigm1841

no turbo boost? how will you ever jump over trains, Michael?

craigm1841

nigelpritchard

nigelpritchard

I removed the electronic actuator and i can move the arm very easily there is no tension on it ,in fact it seems to move back and four to easy ???

nigelpritchard

THERE IS ALWAYS 1 PRI## (CRAIGM1841)

ktlocklear

With the acuator removed....then yes, the flapper should swing open and close very easily as there should be no tension to keep it shut. Does it swing open/ close with no binding? I assume you are doing this with the engine cold.....you need to heat up the exhaust side of the turbo somehow and test it hot, since thats when you are having the problems......

craigm1841

someone has gotta do it

nigelpritchard

yes checked the flap when cold ,no binding,will rebuild this aftrnoon take car for a road test ,warm car up and again remove actuator to see if its siezed.i will keep you posted a s a p.