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2005 t660 turbo, no power, no takeoff, only goes 55mph and at 6000. Where do i start troubleshooting?
 

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first check all your boost lines from turbo-intercooler-then to throttle body. it would seem you have a boost leak and possibly blew a hose off. Make sure the solenoid for the wastegate is plugged in and not disconnected. There is a line from the compressor outlet that tee's off and goes to the wastegate as well as the solenoid. when you are one the throttle that little solenoid energizes and vents that line so that spring pressure in the actuator hold that wastegate closed and you build boost and power. I would start there

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2005 t660 turbo, no power, no takeoff, only goes 55mph and at 6000. Where do i start troubleshooting?
Any luck yet?
 
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