runnin lean????

[big-j]

ok so over the winter i got a jlt cai xcal tuner and did the diy cmcv i got the 93 octane rear o2 off bumpd the idle down to like 690 i did have it as low as it went but it would stahl out and throw the check engine light sayin its runin lean so i bumpd it to 690 and at wot 4.0 richer and it still throw the check engine light and it says its runnin lean???any ideas y??im goin to get a tune from bbr next month but would like to get this fixed befor its annoying havin that lil basterd on everyother day.

 

[TexasKyle]

Just out of curiosity, why did you turn the idle down?

 

[JeremyH]

You can get lean bank codes from a vacuum leak as well and if there is a vac leak, lowering the idle is def not helping!!!!

 

[big-j]

idk y i turned the idle down.ok i got a oil seperator on it to could that be suckin air in and causein it??

 

[JeremyH]

Is it a closed system seperator or breather catch can? PIcs?

 

[big-j]

its the diy one i just took pics of it ill post em when the gf gets home idk how to put em on the computer

 

[martinr69]

Hey I am having the same issue here. Is it the P0171 code? because that's what I am getting

 

[martinr69]

Hey just to give you heads up, Just found out that my issue was that the O2 sensors was bad. That's why mine was throwing the lean code so you may want to check yours.

 

[JeremyH]

I was gonna say if you guys are having the same issue with the JLT cai/tune.
Pm Jay Tucker or post in his vendor section and see if he can help.

 

[big-j]

ya thats the same code im gettin to my car only got 40000 miles on it could a o2 sensor go out that soon????

 

[martinr69]

don't know what a time line is on a o2 sensor. But just check those out since that was what my issue was. Plus on tune I just ordered a new one today from Brenspeed

 

[big-j]

so lets say its bad can i switch out the bad o2 with one of the rear o2 since there shut off??the rear o2 are the ones that are in the catts right??and how do i check to see if its bad?

 

[JeremyH]

Not 100% on that but i dont think you can i believe they are different style from front to rear.

 

[big-j]

danm how do you check em???

 

[bigray327]

Front to rear, they're different. Left to right, they're the same.

I don't know how long an O2 sensor is supposed to last, but I've changed two of them after 3 years, and just had to change my wideband O2 sensor (for the gauge) after 2 years.

 

[JeremyH]

Well i feel lucky then as my car just turned three and the 02s and wideband sensor havent given me any trouble (28,000 miles)

 

[big-j]

anybody know how to check o2 sensors?actully if im throwin the same code that martinr69 did wouldnt that mean its a o2 sensor????

 

[JeremyH]

Most likely. Does the code specify what bank (which side) you could swap the left and right side front 02s to see if the code follows the o2 to the otherside or swap in a new one.

 

[martinr69]

anybody know how to check o2 sensors?actully if im throwin the same code that martinr69 did wouldnt that mean its a o2 sensor????

I took mine into Gearheadz and had it checked. i did everything i thought was wrong and did what lightblade said to check as well. After the code still poped up that's when I took it in.

Make sure it's the same code. mine was P0717 (b1)

 

[big-j]

ok ill double check it next time it comes on i just washed and waxed my car today i used that black box whitch wrks rly good and its spost to rain the next 3 days so its gonna be in the garage sleepin till its nice out agan