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Prior to the problem:

My buddy has a 2006 V6 4.0 Mustang with the powerhouse turbo. Today he swapped the 7lb wastegate spring with a 12lb spring. We also installed the methanol injection kit from Snow Performance. We had it dyno tuned on a Dynojet and everything went smooth.. Car ran flawless. This leads to my enquiry.

PROBLEM:

Today going down the road under full throttle the car jumped from its 10lb boost setting to nearly 24 lbs. I'm wondering if this is a wastegate malfunction. I've had wastegates stick open on me before and loose all the boost so I was just wondering if getting stuck closed would it cause the opposite effect..?

If anyone has any knowledge on this please respond asap.


Thanks,

Cole
 

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Was it a 24lb spike? or was it a constant 24lbs?
What kind of wastegate, It could have very well gotten stuck closed.
 
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