running lean.... help please

[aeroblu22]

my SES was gone from monday through about 30 minutes ago today...

i was driving through eustis and my engine light lit up, so i pulled into autozone and had em pull the code. the scanner said the engine was running lean, and the guy said something about it was "code 101" [img]{SMILIES_PATH}/confused.gif[/img]

anyways, just wondering what ya'll think it might be. i got an appointment at the dealer tomorrow to see what it is.

until then, i'm running 89 octane just to be on the safe side.

[slowion2]

no, run 87, you have NO need for higher octane

there's a chance that it's from the intake. I'm sure they never cleared the codes and reset it when they put the new intake in. it could very well be from the intake again, or the MAF might simply be bad.

[aeroblu22]

if they never cleared the codes, then why was the SES off for 2 days?

and actually, i got 89 in it cause the gas station i stopped at last night was out of 87...

as for the MAF sensor, then i might be moving on to my 5th MAF sensor... [img]{SMILIES_PATH}/confused.gif[/img]

[slowion2]

because the light may go off but the code can still be there in memory

if that's an oiled filter, expect to go through MAF's more often than you should

[aeroblu22]

well...i was driving some more today, and the light just turned off. [img]{SMILIES_PATH}/confused.gif[/img]

i called my dealership to cancel tomorrow's appointment (since i'm gonna be there in a week or so for oil change anyways) and they said it might've been a loose gas cap...

[slowion2]

that's possible, though it wouldn't cause a lean code

take the cap off and put it back on, then pull the ECU fuses in the box for a few min, put them back in and try to start it. don't give it any throttle while it tries to idle down or crank up.

[aeroblu22]

i'm beginning to think that possibly the lean code was left over from the old intake, since after the light went off i went back to autozone and it was still saying that code, so who knows how long that'd been in there.

[slowion2]

it is possible

[linefire]

its probably the chicken feathers caught up in the cadalitic converter.

[aeroblu22]

uh huh...yep...sure... [img]{SMILIES_PATH}/rolleyes.gif[/img]

and it's catalytic.

[linefire]

thank you school marm... its probably the truck exhaust f'n with the blowby and the flux capacitor

[aeroblu22]

flux capacitor? maybe i should check that next time i top off my blinker fluid. :roll:

[slowion2]

you already have your answer

[project92SC2]

fuck it, run lean. leaner = meaner.

[saturnspeed_12]

ill go with vinny on maf. ive had a bad maf, and hell ive driven the car for a week, then all of the sudden it comes on. then can go off or i can clear it and come right back on. then again it can take a couple hours, days, weeks, before it comes back on. car ran hella lean.

and yeah no reason for the 89. you can actually "lean" out the motor with the higher octane. it has a higher flash point so it takes more to ignite it