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Loss of boost and rattle

1K views 1 reply 2 participants last post by  biz 
#1 ·
Hello

I have a situation on an 01 Ford with a Superchip, performance exhaust and an air intake system. When towing up hill the engine will start to rattle and the boost will start to drop on the boost guage. If the throttle is lifted the rattle goes away and the boost comes up.

Any thoughts ?
 
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