starting revving by itself

2003 FORD F-250
174,445 MILES
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JOSHUASANCH2012
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5.4L gas engine revs out rpm I put a throttle body spacer on my f250 gas engine and when I turned it on it starting revving by itself and wouldn't stop what's going on?
Jul 21, 2012 at 9:15 PM
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ASEMASTER6371
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big vacuum leak. did you use 2 new gaskets??

Roy
Jul 21, 2012 at 11:22 PM
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JOSHUASANCH2012
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Yes I did was I supposed to take original gasket off?
Jul 22, 2012 at 3:37 AM
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CADIEMAN
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yes u were
Jul 22, 2012 at 3:51 AM