Hello all, well I've tried just about everthying oher than a dyno tune here's my mods as listed

acufab plenum 75mm throttle body
pro m 85mm maf
densecharger cold air kit
bbk equal legnth tuned headers
bbk off road x pipe switching to prochamber next week hate x pipe , for sale! have mil's too
flowmaster at series catback
3:90 gears
oil seperator
canton aluminum pan with windage tray
energy suspension motor mounts
steeda underdrives-not installed yet
predator with minor tuning, 180 degree thermostats

My problem is this, the car idles great, runs great, but every 4 days or so the ses light comes on, 0174 code bank 2 is r unning lean. I've tried adjusting the fuel on the predator but can't seem to get it to even out. Any ideas, cha nging the fuel filter tomorrow but running out of ideas, do I just need a dyno tune done with fuel monitoring as well as timing adjusted? This is ticking me off! Please help
Brett

Did anyone else have this problem?

 

could just be a bad O2 sensor, are they the oringials, how many miles? might try switching bank 2 to bank 1 and see if the code changes.

 

They are originals, I got about 14,500 on the odometer now. Shouldn't be a problem but oviosuly somehting is wrong. Any help is greatly apprecaited
Brett

 

I would guess and say you probably need a real tune. The predator probably can't conpensate for the mods you have. Between having no cats and headers, diff. MAF and intake mods, it doesnt really surprise me that your getting a little lean. Id run it on the dyno and see where A/F ratio is. Only way to know for sure.

 

What I figured, thanks for the advice, I'm hopinig on not grenading my car....I will have to definately get it in, now my question is this, with tehse tuners do you tune the car different in winter andd summer to compensate for the coldere air? just curious, would make sense if it's tuned otpimally now, it would be concievable that the car would run lean in 90 pllus degree heat no? No boom!

 

Can't say Ive heard of that being a issue before. I know on the top fuel, prostock, things of that sort, they tune for just that sort of thing but I don't think its much of a issue on a regular street car. Unless your running really lean, you should be in clear till you get a tune.

I was at a dyno day a couple weeks ago and a guy with a SHO ran his car and they aborted the run because he was so lean. He even went off the scale. I think he went past 9:1 or sumthin nuts on the second run when they cut it off early.

 

$10 says you have an exhaust leak. Check, closely for leaks on that side.

 

I would highly bet on a leak somewhere weither its from the tb plenum or heades etc.. you got one befor the front sensor.