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Old June 30th, 2013, 08:53 PM   #7
Wishin' I waz fishin'
frdboy's Avatar
Join Date: 03-29-06
Location: Grand Haven, MI
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Sounds like you are losing vac. to the booster in reverse, maybe a cracked vac. hose that flexes just right in reverse? Maybe a weak vac. pump but not sure why it would only act up in reverse. Bad vac. pumps on diesels are kinda common.

Have you tried pumping the pedal while rolling forward? maybe it will act up as well and you just have not noticed it yet??
Cheap Thrills Off Road

2003 F-250 4X4 7.3 PSD Crew Cab

1971 Bronco
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