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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

vacuum pressure

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Old Sep 14, 2014 | 10:04 AM
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cryptyx
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From: Ontario
vacuum pressure

So I'm positive my truck has a vac leak, so today I'll be picking up either a vac tester or fog machine to determine where it might be. Should a 92 5.0 hold vac pressure 100% after shutdown or will it dissipate after some time? And if so, how long until it loses pressure entirely? Any other tips/ input is also appreciated. Also, the vac canisters on these trucks control the 2 sensors by the ignition module, if one of these sensors were faulty what would be the symptoms?
 
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