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My turbo seized up last weekend, removed it and had it rebuilt, cleaned the inside of the intercooler, all the intercooler pipes, the inlet manifold, the inlets on the cylinder head, the EGR valve, the turbo oil feed and return pipes, oil breathers and all associated holes that go in to the block. Put it all back together, primed the new turbo with oil fresh oil and filter. Test drive started out alright, but then started struggling setting off, foot flat to floor in 1st gear and it bearly makes it to 2500 RPM. Same symptoms as the seized turbo......gentle drive to get it home praying to the big guy in the sky that the turbo hasn't gone again.......on closer inspection it hasn't phewww. What else can be causing this lack of power? Anyone know how the turbo vacuum solenoid should work? Any help could be greatly recieved as I'm at my witts end with it now!
 

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Hi, having the same problem myself.
By vacuum solenoid do you mean the wastegate actuator?
If so, the little leaver on the bottom of the the actuator should go in by about an inch whenever the car is started. If it doesn't, try pushing it in with your fingers - if it goes in check if the pipe that is connected to it is sucking the air when the car is started.
If it doesn't go in you will probably have to take the turbo off to change the wastegate actuator - I don't think it's possible to change it from the top...
 

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Yea the valve that controls the actuator, the actuator itself is fine it goes in both manually and with the vacuum, just had the whole turbo refurbished so it should be right! But it doesn't seem to do much after that when the engine is revved, I'd have thought it would move back, although I can't check it under load.
 

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It doesn't move on the Laguna that I had. Once it moves in after the car is started it stays there. I checked it on another Laguna when revving it and it didn't move. Have you checked the MAF sensor?
 

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No haven't checked the MAF yet, what is the best way to check this? Bet all the shops and breaker yards are closed today too. :steam:
 

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Doesn't sound like a faulty MAF sensor to me.

Could it be the vacuum pipes to and from the vacuum solenoid have been fitted the wrong way round. Change them over and see what happens.

Also check that vacuum is getting to the solenoid.:)
 

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Just try disconnecting the MAF sensor. It doesn't really sound like the MAF but it's worth a try. Doesn't cost anything to disconnect it.
Are you sure your EGR valve is working?
 

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had the same problem with mine after rebuilding turbo electronics seem to be cutting the power i think its too much boost i adjusted the actuator a bit at a time till it was ok lenthen the rod
 
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