need help badly
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New User
Joined: Jan 2009
Posts: 7
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need help badly
I drive an 05 f250 w/5.4 my wife drives a 2000 expedition with 5.4 on the wifes truck it has developed a probem after the motor warms up and it is extremely cold out when you pull up to a traffic light it wants to stall unless you pop it into neutral and keep your foot on the gas i have already replaced the iacv and it is throwing system lean on bank 1 and 2 any ideas
Logistics Pro
Joined: Jan 2001
Posts: 3,740
Likes: 37
From: Central NYS
Since you have both the P0171 and P0174, both banks are lean, so the leak would have to be something that would effect both banks. Perhaps a leak after the MAF and before the TB? Dirty MAF? If the intake is the cause, both sides would have to be leaking. Is your dip stick fully seated? EGR valve not seating completely? Exhaust leak upstream from the O2 sensors?
