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650 mighty demon bad idle

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07-17-2007, 11:48 AM

84 z28

Senior Member

Join Date: Apr 2006

Location: Rochester NY

Posts: 1,515

Car: 1984 z28

Engine: 355

Transmission: 700r4

Axle/Gears: 10 bolt 4.10

Classifieds Rating: (0)

650 mighty demon bad idle

I have a 650 mighty demon on my 355 and he idle is very weird. I have the carb setup as the instructions say and it will only idle at about 500-600rpms in park. But if I unplug the brake booster from the back of the carb it idles at 900rpms like its suppose to. What am I doing wrong??

07-17-2007, 11:48 AM

ThirdGen

1992 Camaro

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650 mighty demon bad idle

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