Mechanics

OEM PO171 AND OEM PO174

2002 Ford F-150 • 114,000 miles

In addition to the these code readings my truck stalls when its idles but only when it gets hot. And the RPMs drop to under 1 when positioned in the drive position. My truck also when its stalls it dies but it cranks perfectly. Neither do expericence stalling going down the road only when its idleing. I've replaced the fuel filter, TPS, and spark plugs. Thanks for any assisitance/help.
Avatar
Brumbalowmichael
April 21, 2013.




171,174 possible failures are vacuum leaks, low fuel pressure, pcv valve bad or mass air flow sensor. A shop should check this for you.

Roy

ASEMaster6371
Apr 21, 2013.


AD