OEM PO171 AND OEM PO174

2002 Ford F-150

Tiny

brumbalowmichael

April, 21, 2013 AT 5:16 PM

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.

FOUND 129 RELATED QUESTIONS

1 Answer

Tiny

ASEMaster6371

April, 21, 2013 AT 6:09 PM

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

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