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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 36030
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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Ford F150 Pickup p0174 on 98 ford f150, idle drops sometimes,

Resolved Question:

p0174 on 98 ford f150, idle drops sometimes, runs rough, goes away, where do I start?
Submitted: 6 years ago.
Category: Ford
Expert:  Ron replied 6 years ago.
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In most cases this code is set due to a vacuum leak and the place to start is to have a close look at the PCV supply line to make sure its not rotted out and leaking and if it checks ok the the usual suspect is the upper intake gasket leaking and the gasket will have to be replaced.
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