Any rubber hose that is attached to the upper intake and any air hoses coming in from the air filter box. Check the PCV valve and associated hoses and vacuum hoses on the firewall. With the engine on, you can move the hoses around and listen for hissing or change in idle.
lincolnscott49 answered 5 years ago
try cleaning the MAF with the correct cleaner and make sure the air filter box is closed properly
my check engine lite is on , where are vacuum hoses, po171,po174
1998 Ford F-150
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General
No check engine lite. There is a code in the system P0B05 My warranty is coming to an end. Maybe it was never cleared. Truck is running fine.
2016 Ford F-150 XLT SuperCrew
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General
we have noticed oil is coming into air filter, what can we do to prevent this?
2003 Ford F-150 Harley-Davidson Supercharged Crew Cab SB
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General
What engine is on 86 ford f150
1986 Ford F-150 STD Standard Cab LB
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General
On my 1998 ford f150 4.2 , changed the battery 3 times , changed the alternator 4 times ,changed the starter twice . new spark plug wires ,new spark plugs , new coil pack ,new alternator connector ,...
1998 Ford F-150 XL SB
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General
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