uberdata afr not stable
 

I am currently running uberdata 1.70 on my b16 with RC 750cc injectors walboro 255lph pump, and fuel pressure at 42 psi at 10.5 psi of boost. I just did a long run where everything was perfect AFR was around 11.50 to 12.20 all the way to redline, so I say ok thats it should be good to go now... turn the car off for 10 minutes, and did another run now I am rich as hell 9.50 to 10.40 what the ----? should I just get that new hondata or what?

edit: I am using zeitronix and uberdata datalogging, its always cold here so its not temperature change, also I had to uncheck PA sensor to idle stable

Re: uberdata afr not stable
 

typical bullshit... Try Crome before you give up completely on Rom Editors.

Re: uberdata afr not stable
 

will chrome work on obd1 ecu's?
I thought I learn enough about uberdata to start helping others but I guess if it runs like ---- on my car I cant recomend it

also at vtec engagement it engage really hard,but no noticeable gain in power. afr is at 11.90 is that too rich or do I need to make it richer, for a smoother engagement

Re: uberdata afr not stable
 

Chrome is meant for OBD1 Ecus

Re: uberdata afr not stable
 

I don't understand. How does it "engage really hard" but you don't feel a gain in power?

Re: uberdata afr not stable
 

really rough,and loud but the car dont launch, like it use to

Re: uberdata afr not stable
 

Are you actually using the Zeitronix datalogging software or Uberdata because there is going to be an inaccurate reading for the non-linear reading of the Zeitronix on the Uberdata Datalogging. I've just been using the Zeitronix Program and it works good.

Re: uberdata afr not stable
 

let me see the uberdata map, post it.

Uberdata and Crome work just fine. They have been proven time and time again. All 3 Hondata/Uberdata/Crome operate by modifying stock ECU code, changing the interface won't cure your problem.

like i said, post the map, ill take a looksie and see if theres anything obviously wrong. From there it could jsut be a retune time.

Re: uberdata afr not stable
 

11.9 is way too rich for VTEC N/A crossover. Try 13.3

Re: uberdata afr not stable
 

went for a tuning run with some help, everything in the afr, is 11.50-12.00 which I think is very safe and perfect, but I threw a CEL on the way back I hit 10.5 psi, but the Cel wont go away even if I reset the ecu and swap chips, hope the ecu aint burnt. I will do a code check tomarrow, but other than that I am satistfied with these AFR 11.90 in boost high and low maps, 16-17 at idle , 14-13 at part throttle, egt at part throttle is 1600*F. and average 1200*F whats a safe egt? at full boost I see 1400*F

Re: uberdata afr not stable
 

that rough engagement is b/c you're too rich. setting vtec is the best if you do it on a dyno.

does your ecu have a pa sensor? you had to disable it to get it to idle right? if yes to both of these than there is something wrong...it's presence shouldn't matter in your case. the change in afr in your case could possibly be from heat soak from letting the car sit for a short time after being run hard during your tuning.

Re: uberdata afr not stable
 

yes I have to uncheck PA sensor to get it to idle right, the PA sensor is that tall dark thing next to the chip correct? if so I have one, what the hell does PA sensor do and what does it stand for?... I dont understank why I threw a cel that wont go away though, I've been running without the PA sensor since I got boosted.

Re: uberdata afr not stable
 

PA is Atmospheric Pressure sensor.

It basically tells the ECU what altitude its at based on the pressure it sees and the ECU will make tiny adjustments because of it.

Re: uberdata afr not stable
 

chance are that if he's boosted, that he's crossing over to vtec while building boost ir not already full boost depending on what turbo he has, therefore 11.9 is perfectly fine ;) what you do want to do though is make sure there isn't a sudden change in the afr or timing right before or right after vtec engagement. for example, say you have vtec engage set at 5200, look at your lambda recording on your hi map and lo map at 5200 and make sure the afr is the same right before it switches over to the high map, also make sure you have the exact same amount of timing at the point where it crossed over from low to high map.

Re: uberdata afr not stable
 

I have no idea what happened but its working fine now with the same chip, with no problem, the butt dyno said I am pushing 280-300 hp at 10.5 psi, any way my zt2 caught on fire so I will be running rich until I get a another one. I burned up a tank of gas in 2 days of tuning runs.