2G: Just started to log wideband

TSITurbo95 · 07-27-2010, 02:49 PM

Ok, just started to log my wideband, and it is set to the rear o2 sensor. Was wondering if you could check out my log to see if everything seems ok. It is just idle, giving it gas a couple times and launch limit.

gofer · 07-27-2010, 05:59 PM

On a fully warmed up 2g M/T the AirflowPerRev should be roughly 0.25 gm/rev at idle, this is what you'll adjust for first. Once you get AirflowPerRev where it should be use your injector deadtime settings to dial in your CombinedFt to 0% (+/- 1%).

Right now your AirflowPerRev value at idle is 0.22 gm/rev and your CombinedFt is about -11%. With that being said you'll use MAFComp to adjust to 0.25 gm/rev on the 0Hz to 50Hz sliders. Once thats good to go you'll adjust your injectors DEADTIME to get your CombinedFT within 1% of ZERO.

TSITurbo95 · 07-27-2010, 06:04 PM

I tried fiddeling with it, but one would go up and other would go down, I could never get both of them to stay low, and if I did, my afr was mad lean at idle.

gofer · 07-27-2010, 06:16 PM

Bring your 0Hz - 50Hz MAFComp sliders up about 9%, this will increase the AirflowPerRev value to about 0.25 gm/rev. After doing this your CombinedFT will change dramatically as well, this can be adjusted using your Fuel tab and playing with your injectors deadtime settings. If your CombinedFT percentage is (+) from 0% increase deadtime from 330 usecs, if its (-) from 0% decrease your injectors deadtime.

TSITurbo95 · 08-01-2010, 02:41 PM

Fixed, CombinedFT is down around 0, and my AirFlowPerRev is around .25gm. Now I have another issue. I do not have a log currently, I will tomorrow probably, but wanted to know if I could get some what of an answer without it. When WOT, in the upper RPM's, it likes to break up a little bit. Plugs/wires are only 5 months old, still running on stock map though (which is rich as a mofo). All supporting mods for big 16g. Only sputters in the high rpm's around 16-20ish psi. Also if it matters, its on wastegate pressure, and creeps that high.

gofer · 08-01-2010, 03:47 PM

Pull your plugs and get new NGKBRP7ES spark plugs and gap them to .028" and MAKE SURE you gap them correctly, I don't care how new they are man just drop the $8 and do it. After you replace the plugs do a BLT just so you know your not wasting your time doing WOT pulls and then I'll send you a good 2g fuel map for your DA.

TSITurbo95 · 08-02-2010, 02:40 PM

Ok, going to try and get sparkplugs tomorrow. Called everywhere around here (pa) and no one has them. So I have to visit MD tomorrow to get some. Mind sending the map so I can take a sneak peak? Boost leak test is good, only a very small leak behind the throttle body in which I can't find. But other than that its good.

gofer · 08-02-2010, 03:06 PM

Post (2) logs, one of your current idle after the cars fully warmed up (+ 180*) and one of a WOT pull in 3rd gear from 3k to 7k. Of course do this AFTER you get your new spark plugs in and gapped like they should be, from .026 to .028".

TSITurbo95 · 08-02-2010, 03:08 PM

Ok, ill do that tomorrow as stated. Also going to tweak some more things. Ill post 2 up tomorrow. Thanks.

TSITurbo95 · 08-15-2010, 01:36 PM

Ok, so I fixed some things, and got a gm 3 bar, and here is an idle log, with a couple revs. Going to tune it this week.