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Discussion Starter #1
I have a 99 lightning 240k miles decided to clean intercooler. ended up breaking the mid plate after getting a wire hung in the back got another mid plate put it back together. and at wot I get 1-2 lbs of boost supercharger still whines loud. looked at boost actuator lever was up and when reved didnt move any thought maybe I got vaccume lines on wrong. so I swapped them started building boost but sputtered badly. and now it has a loud whistle any ideas to what my problem is ?
 

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11 Posts
Discussion Starter #2
So I took the pink wire from the boost bypass and plunged it into the t going to boost gauge and I got boost now but still cabt find the god awful loud whistle
 

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local painter
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2,865 Posts
It’s a Vac leak.
You just removed the blower and midplate.
 

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11 second street truck
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10,335 Posts
I'm with Kenny. A loud whistle is probably a vac leak. What's your boost gauge look like at idle
 
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