budders

hey guys i've been having issues with the 4.6 lately. its throwing a p0171 system too lean b1. the car is stuttering and sounds choppy. i had an exhaust leak, got that fixed yesterday, checked for vacuum leaks, cleaned the MAF sensor. the car has 100k on it so maybe its time for a fuel filter or fuel pump? i have a video of the issue, it usually stutters anywhere from 1200rpms- 2200rpms, any rpm higher than that it runs okay.

should i data log with my sct tuner?

im not even sure if my phone could pick up the sound, but you might be able to hear whats going on in this video.

http://www.youtube.com/watch?v=KJd1k...ature=youtu.be

DjBootleg813

Having the EXACT same problem right now.... Changed my fuel filter and still isn't any better... Pretty sure it's the 02 sensor.. Mine was unpluged but I might need to replace em.. Idk I'm interested in what the other guys have to say... Hopefully we can get this figured out..

budders

I have an sct tuner, running a bama tune and im pretty sure o2s were turned off in tune, when i return the tune to stock it got way worse.. I have a catless x pipe

DjBootleg813

COME PEOPLE WE NEED ANSWERS!! BUMP BUMP BUMP

budders

ikr, maybe its a vaccum leak?! i sprayed starter fluid all around air intake and stuff and couldnt get the motor to jump rpms :/

djbootleg, that car looks pretty sick, got any nice pictures. and im trying to hear an exhaust vid with those LTs and o/r h pipe. what kinda mufflers?

DjBootleg813

lol thanks man.. na no video yet.. wanted to do it but im having problems with my exhaust.. tryna find out what it is.. matter of fact im gonna post up a topic lol....