Lean Bank 1 and Bank 2

[Turbo92PGT]

Yesterday my check engine light turned on, on the way to my grandmas. I didnt think toooooo much of it, when I got there i reset the computer. Stayed off till I was goign home, and then it turned back on, I checked the engine over, intake and everything and reset the computer again. Today after driving around a long time it turns back on. I've finally had enough of it. I goto the autoparts store and get the codes pulled. The guy pulled them and as it was doing so he said "OH ****". My heart kinda sunk. He told me Lean Bank 1, and Lean Bank 2.

I go home and pull the front O2 sensors out. They're WHITE!! I spray the contacts with electrical cleaner and put some antiseize on the threads after spraying some carb cleaner on the sensor itself. That put back together, I go and clean the wires in my MAF. This whole time, my negative terminal is off the car, and when I get it all put back together I step on the brake for a whlie to reset it.

I start the car up, it seems to run fine, but I had no problems before. No CEL. I spray aerosol spray around all the couplers on the intake to see any leaks. None were found. I'm stumped guys. I'm 17 and dont have alot of extra cash to waste on this car. I'm fairly mechanical when it comes to cars, but i'm new to this whole mustang scene.

I need help!!

Andy

 

[Dark Knight GT]

If you havent gotten the CEL again, I would say the problem is fixed. The white stuff on the tip of the sensors could be condensation but I dont know that for sure.

 

[mogs01gt]

For precaution, run some higher octane fuel. You may have got a bad batch of fuel. Other than that, you may want to get your fuel pressure checked. my first thought was that you had a C&L on your car but I dont see any major mods.

 

[DiabloRojoStang]

I had the same problem. Went to emmissions and it spit out the same code. Turned out the mechanics had removed my K&N to clean it and forgot to put it back on. I have a CAI so I didn't see it. The computer was trying to correct for an atmospheric pressure that didn't exist. My exhaust sounded merney though! Unfortunately, car ran like the poo.

 

[99 silvr35th]

I have the same issue and i do have a 80mm C&L, they sent me a richer calibration but the light still came on. Could it be the O2 sensors, MIL's, or is the C&L causing it? Am i hurting the car driving around with this lean code?

 

[mogs01gt]

I have the same issue and i do have a 80mm C&L, they sent me a richer calibration but the light still came on. Could it be the O2 sensors, MIL's, or is the C&L causing it? Am i hurting the car driving around with this lean code?

Its the C&L. Not it probably wont hurt anything. I have had that for like 10k miles.

 

[Turbo92PGT]

I dont believe the car is fixed. The past few days the car has been having a weird idle. Say im going 35 and push the clutch in or put the car in neutral, and still rolling. The idle goes down to normal 650, and then goes up to 1300, and then back down to normal and back and forth. My car hasn't thrown a code for the lean yet, but thats just because it hasn't had enough time. Nothing I've done is going to fix it I dont think. I'm really kind of worried guys. I heard the car pinging up the hill yesterday. I'm running 11-12* on my Timing adjuster with 87 fuel.
Could be a bad tank of gas, could be clogged fuel filter, who knows, but its kind of scaring me. I'm turning my timing down to 10 today, and maybe even retard it so it wont ping. The gas I have in my car is all I have untill Friday, when I get paid. I kind of f'd up the budget for this couple weeks lol.
I am not running a K&N filter, Bigger throttle body, MAF, plenum, anything like that. I have some no name cold air intake off ebay, with a non reusable filter.
The only thing i've changed before the code, was I normally dont run the cold air "bend", I've just been running a straight filter on my MAF. It seems to be running like a raped ape, its MOBBIN, but I sure as hell dont want to hurt this car. I keep having 'nightmares", lol this is the second or third one I've had, where I sold my mustang and bought some other car. I always wake up lol, its weird.

 

[99 silvr35th]

Its the C&L. Not it probably wont hurt anything. I have had that for like 10k miles.

so you've been driving with the CEL on for 10k miles? should i put back the original calibration or leave the richer one in. is there no fix to this problem. the car runs good with it, that's why i'm a bit hesitant to take it out.

 

[mogs01gt]

so you've been driving with the CEL on for 10k miles? should i put back the original calibration or leave the richer one in. is there no fix to this problem. the car runs good with it, that's why i'm a bit hesitant to take it out.

on some cars rotating the MAF will allow the motor not to throw codes. Some times it works, sometimes it doesnt.

 

[Turbo92PGT]

What I dont understand is I used to run the cold air intake, had no trouble with it whatsoever. I even did that "darkwolf" mod or whatever, where you rotate the MAF to get it to lean out. I took the cold air bend off to see if it was faster, seemed to work just fine, I left it off for about a month. Then after I went to the track, that night I came back and put the intake bend on. A couple days later I got the check engine light. The MAF is in the stock position

 

[Dark Knight GT]

How many miles are on your car ? It could just be that your front o2 sensors are gone bad and need replaced.