1998 vacum hoses my check engine lite is on

Asked by Thomas Nov 07, 2019 at 07:09 PM about the 1998 Ford F-150

Question type: General

my check engine lite is on , where are vacuum hoses, po171,po174

2 Answers


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.


try cleaning the MAF with the correct cleaner and make sure the air filter box is closed properly

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