computer codes?
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New User
Joined: Aug 2005
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computer codes?
hello, i have a 2001 ranger edge 4*4 and it just threw a po171 & po174 code, i have checked all the vacume lines and egr valve (with a vacum pump) and looked at the maf sensor (which doesnt appear to be dirty) i also have checked the iacv valve and it is working properly. and i still have the light(check engine) and the problem. what do i need to check now? thank you, grant.
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Also check the PCV valve.. make sure its seated properly in the grommet.. i've seen quite a few come out.. even a couple "cracked" valves.
They are pretty cheap.. usually under ten bucks.. might as well throw a new one in there while you're at it.
Other possibilites = putting ethanol (E85) in a non flex-fuel vehicle
Low fuel pressure and/or volume
Intake leaks (as previously mentioned)
Poor fuel quality
They are pretty cheap.. usually under ten bucks.. might as well throw a new one in there while you're at it.
Other possibilites = putting ethanol (E85) in a non flex-fuel vehicle
Low fuel pressure and/or volume
Intake leaks (as previously mentioned)
Poor fuel quality
