I've been bit by the CEL bug... GRRRRR!
I've been bit by the CEL bug... GRRRRR!
Ok.... I got code p0401- insufficient EGR flow... Also got lean bank codes po171 and po174... I replaced EGR valve, EGR Flow sensor and called everyone I knew. Still got a check engine light... My truck is an 02 4.0 with 42,000 miles... WTF!!!!! What else could it be? I have a cold air intake and the rest of the truck is stock... I'm taking back the sensor and EGR valve tomorrow and replacing original. Any Ideas?
ummmm its a little dry... uh oh
thanks dude. Im trying that tomorrow... Its getting Seafoamed with new plugs and an oil change too! woohoo!
on the right side of your intake, there is a vac line that runs from the back of the motor to right by the throttle body, the upper radiator hose rubs on this elbow and rubs through. get a can of carb clean when the motor is running, idling, and see if the rpm changes depending on where you spray. spray around that line or remove it and inspect it and see if there is a problem with it. this would cause your lean code but im not sure about your EGR code, could be the DPFE sensor if i had to guess
Last edited by Toreador4x4; May 31, 2009 at 04:42 PM.
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on the left side of your intake, there is a vac line that runs from the back of the motor to right by the throttle body, the upper radiator hose rubs on this elbow and rubs through. get a can of carb clean when the motor is running, idling, and see if the rpm changes depending on where you spray. spray around that line or remove it and inspect it and see if there is a problem with it. this would cause your lean code but probably not your EGR code, that is most likely the DPFE sensor if i had to guess
did both... no luck.... seafoaming tonight..... then new plugs and vacuum lines...
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