P0171 P0174 Vac leak?

gytwypt

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Alright it has been a long time since I have been on here. Been tweaking my superduty.
But the wifes engine light came on in her 03 Nav. Hooked AE up and came up with the lean codes. I am not sure where everything is on this yet, but did some searching before posting this and seen that a vac leak can cause this. Well I found a 90 rubber end on a vac tube near a little motor top center of the engine almost against the firewall. Looks to be almost a half inch hole. Anyway that 90 is about deteriated into. definetly a hole in it.
Could this cause the problem and where would I get one. Does anyone have a part number.

thanks in advance
Joe
 
wow cant believe this thread is still on the front page. Anyway it was the problem and a boot off of a spark plug wire did the trick. I have not had a problem with it since.
 

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