why am i running so lean!!

[malloynx#2]

lately my o2's have been in the .840 range, i try to richen it up with the maft+, but it's still stays it that range. i richen it up 10% and it still stayed in the .840 range.

are my o2's going bad?
do i need new plugs and wires?
i have no ses lights and the car is running pretty sluggish... i want to be ion thhe .900 range, but it seems impossible.

[malloynx#2]

i just changed my settings on the maft+ to %14 rich and now i'm seeing .800 on the o2's. what gives. can my maft+ unit be working backworks..

[slacker69]

I dont notice a change really with my maft+ as well except i am running really lean also the only thing i see change is the KR I seem to get more.

[MoreThanAV6]

Bad 02 sensor?

[malloynx#2]

MoreThanAV6 Bad 02 sensor?

i was thiking this, but i have no ses light. usually bad o2's will throw a code.

[DEE97GTP]

Guys, remember if you are adjusting the base setting, that the computer will attempt to compensate for it(learn the changes out). The computer is going to shoot for the programmed A/F, except at WOT, where it doesn't look at the O2. If you adjusting the WOT setting, and it isn't helping, then I am not sure what is wrong.

DEE

[Dominic]

If you're not knocking, you're not too lean. Under partial throttle conditions leaner hurts nothing and saves fuel... the only time you should knock is if you run lean @ WOT and thats where the MAFT will come in nicely [img]smile.gif[/img]

[slacker69]

I am adjusting the WOT setting and i get up to 10 degrees of KR

[malloynx#2]

update>>> i disconected the maft+ and the car is runnig good. and i' running +4% advance so ever thig is good now

[nino]

focking maft+!!! does it work for anybody?
you, slacker, kieth and now i even have disconnected the maft+ in some way or the other.

[John_D.]

<blockquote>quote:</font><hr>Originally posted by nino:
focking maft+!!! does it work for anybody?
you, slacker, kieth and now i even have disconnected the maft+ in some way or the other.<hr></blockquote>

I'm still using mine. Otherwise I run too rich at wot. (na and sprayed) It's not a plus though, just a maft.

[malloynx#2]

yea i hear what you are saying. with the maft+ hooked up i was seeing.840's on my 02's and this was +6 rich. now with it disconnected i see .880 which i think is perfect. i still have the timing at +4 advance and my car seems to like it there. i want to try an experiment and run 108 octane with the advance max out on the maft+ [img]graemlins/evilgrin.gif[/img]

[Magnus]

umm.. i'm confused... you guys are all spitting out partial details.. we need full details.. ie you adjusted WOT MAF setting while leaving base at zero.. you have no MAF/TB modifications, etc. etc....

make SURE you connect the MAF T+ up right.. PINK TO PINK.. if you hook it up backwards you could fry things.. it says it in the directions to be very careful to make sure pink goes to pink!!!

Also, when you are monitoring yoru O2's at WOT, what is your injector pulse with and LT's??

It would be nice to see a few lines like this:
RPM O2 IPW LT

and perhaps even maf frequency.

[slacker69]

When i un hooked the MAFT part and put in the stock MAF plug and ran 6 degrees of advanced timing i got no KR and then i hooked up the maft+ and left everything at 0 no changes at fuel ratio and i got 3-6 degrees of KR here should of been no change cause fuel setting was at stock. When MAft is hooked up my injectors dont pulse as much the are behind by about 2.x pulses O2s are around .830-.840 with maft in at stock setting and without the maft it is .890 I dont think the MAFT part will ever be hooked up again

[Magnus]

I believe the timing part +... needs power that is taken from the MAF conncetions.. so timing adjustments may not work if the MAF side is disconnected.