Well first off hello to everyone, i'm new here to the ranger forum. Second off I need help from you guys, recently my check engine light came on and the code was the MAF sensor was dirty or the O2 sensors were bad. So first i went the cheap way and cleaned the MAF sensor and it didnt seem to make the check engine light turn off. So next i changed out the two front O2 sensors and that seemed to do it. So everything was fine until the check engine light came on again not two hours after it turned off. So now i have the error code, System To Lean, so the guy at autozone said throw some fuel injector cleaner in the gas tank and it should be good. Im still on almost a full tank with the cleaner in it cause i don't drive to much. But now it is idleing weird.. And that is where im stuck.

People also have told me that i may need to change my gas cap because it may not be holding to much pressure because the seals may be bad, and another told me it may be because the fuel filter needs to be changeds out.

Any advice would be awesome. Hopefulle you guys can help me out on this

Need the pertinent information about the truck. Year, motor, you know the details.

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'02 XLT ext. cab 4.0 4x4 Off Road
Usual mods
Unusual color
Only a real man can pimp DWB

gas cap light would come on if the cap was loose. check the air intake hoses. mine did the same thing and it was an elbow hose that was cracked which i learned is common. The hose is a cheap fix so check that first.

number one, what are the exact codes youre getting and two, stop listening to the fools at autozone, all they are going to do is sell you some crap you dont need. normally lean codes indicate a vacuum leak whether it be a blown intake gasket or a cracked vacuum hose.

X2

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Guys what is the exact name for that elbow? I see this come up in threads all the time and can't really give a name for it.

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'02 XLT ext. cab 4.0 4x4 Off Road
Usual mods
Unusual color
Only a real man can pimp DWB

im not sure, i posted a pic of it here a couple times just have to find it. if his truck is an 01+ 4.0 id bet thats his problem.

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Alright guys all the information about my truck is in my signature. Im sorry Im used to the Jeepforum which gives a full list of details in your profile, which ranger forum wont let you. But the exact code i got was this one P0171 System Too Lean - Bank No. 1.

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2001 Ranger XLT, 4.0L SOHC V6, 5 Speed, Extended Cab, 4X4
2009 Ranger XL, 2.3L I4, 5 Speed, 4X2(Sold)
1996 Ranger XL, 2.3L I4, 5 Speed, Step Side, 4X2(Sold)

Yeppers I agree. Took me a WHOLE LOTTA money to figure out that little cracked elbow was my problem. Just really don't want anyone else to go through that crap.

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'02 XLT ext. cab 4.0 4x4 Off Road
Usual mods
Unusual color
Only a real man can pimp DWB

cracked elbow. What'd I win?

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'02 XLT ext. cab 4.0 4x4 Off Road
Usual mods
Unusual color
Only a real man can pimp DWB

Patrick find that pic and do a write up for a sticky

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'02 XLT ext. cab 4.0 4x4 Off Road
Usual mods
Unusual color
Only a real man can pimp DWB

I was told its an intake hose, thats it

So where exactly would the cracked elbow be?

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2001 Ranger XLT, 4.0L SOHC V6, 5 Speed, Extended Cab, 4X4
2009 Ranger XL, 2.3L I4, 5 Speed, 4X2(Sold)
1996 Ranger XL, 2.3L I4, 5 Speed, Step Side, 4X2(Sold)

Ok Tom here we go....
Open hood and stand directly in the center of the truck facing the rear.
At the front of the intake there is a hard plastic hose that runs to the left (passenger side) and make a 90* turn to the back of the motor. At that 90* bend there is a sfot rubber elbow that is notorious for splitting down the inside seam. Check there. I replaced mine with a schd 80 PVC fitting and high temp hose to complete the connection.

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'02 XLT ext. cab 4.0 4x4 Off Road
Usual mods
Unusual color
Only a real man can pimp DWB

thats a damn good idea, it pops up here frequently.

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Alright when i get back home i will check it out. Thanks everyone for all the help. I will post back the results.

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2001 Ranger XLT, 4.0L SOHC V6, 5 Speed, Extended Cab, 4X4
2009 Ranger XL, 2.3L I4, 5 Speed, 4X2(Sold)
1996 Ranger XL, 2.3L I4, 5 Speed, Step Side, 4X2(Sold)