WOT HPTuners Log Question
#1
Instructor
Thread Starter
WOT HPTuners Log Question
Hey fellas, I got a log here with some weird action in the upper rpms. For some reason my fuel is leaning out and well..you'll see. the maf and other junk just looks kinda wacky. Help me out here guys. There are two "pulls" toward the end of the log.
Thanks,
Ben Marino
Thanks,
Ben Marino
#2
Instructor
Thread Starter
Anyone?? I'm wondering if I have valve float as well with that MAF reading.
GT12 Lingenfelter Camshaft
Comp Beehive Springs
GT12 Lingenfelter Camshaft
Comp Beehive Springs
Last edited by bmarino1974; 06-16-2017 at 02:42 PM.
#3
Safety Car
I don't' see anything unusual with the MAF reading. Looks smooth to me.
Your fuel is commanded at 12.4 and is rich at lower rpm and lean at higher rpm.
Perhaps it's just not tuned real well?
Your fuel is commanded at 12.4 and is rich at lower rpm and lean at higher rpm.
Perhaps it's just not tuned real well?
#4
Instructor
Thread Starter
Well it's a mail tune but here's an updated log. My wideband was in a bad spot..now this is dead accurate. And the maf is surging up and down through second and third gear around 5000 rpm.
#6
Safety Car
This is what I see.
Commanded fuel is 12.49:1 (Green)
Actual by your wideband is mid 11's. (Yellow)
The MAF freq and flow look normal to me. I never see perfectly smooth MAF curves.
Ron
Commanded fuel is 12.49:1 (Green)
Actual by your wideband is mid 11's. (Yellow)
The MAF freq and flow look normal to me. I never see perfectly smooth MAF curves.
Ron
#7
Instructor
Thread Starter
Thanks for the input!
Ben Marino
#8
Burning Brakes
I don't post here in the C5 section but happened to look at that 1st log and was stumped by the leanout because it only happens only when the vehicle speed increased.
Just curious, where was your WB sensor located to cause this??
Just curious, where was your WB sensor located to cause this??
#9
Instructor
Thread Starter
Someone had put a bung in the header that was basically pointed at the ground so I bought a angled adapter to move it away from the ground. The only thing I can think of is that staying at high rpm constantly (shifting through gears) and high exhaust flow slowly removed the concentration that I guess had built up in the adapter, leaning out the reading. or something like that lol. I finally tore my exhaust apart and added a bung in the cat, before the catalyst. It's way more sensitive now, and accurate.
#10
Safety Car
You're welcome!
My headers conviently had the bung in the center of the X-pipe.
WB readings are probably best observed in third and 4th gear.
i know in my auto, low gear is always a smidge leaner than 2nd and third despite the airflow falling in the same MAF range.
Ron
My headers conviently had the bung in the center of the X-pipe.
WB readings are probably best observed in third and 4th gear.
i know in my auto, low gear is always a smidge leaner than 2nd and third despite the airflow falling in the same MAF range.
Ron
#11
Burning Brakes
Someone had put a bung in the header that was basically pointed at the ground so I bought a angled adapter to move it away from the ground. The only thing I can think of is that staying at high rpm constantly (shifting through gears) and high exhaust flow slowly removed the concentration that I guess had built up in the adapter, leaning out the reading. or something like that lol. I finally tore my exhaust apart and added a bung in the cat, before the catalyst. It's way more sensitive now, and accurate.
Regardless, the car seems to be running great.
#12
Instructor
Thread Starter
You're welcome!
My headers conviently had the bung in the center of the X-pipe.
WB readings are probably best observed in third and 4th gear.
i know in my auto, low gear is always a smidge leaner than 2nd and third despite the airflow falling in the same MAF range.
Ron
My headers conviently had the bung in the center of the X-pipe.
WB readings are probably best observed in third and 4th gear.
i know in my auto, low gear is always a smidge leaner than 2nd and third despite the airflow falling in the same MAF range.
Ron
Thanks
#13
Instructor
Thread Starter
Yeah it seems to be fine now. I actually think its a bit slow lol. I wanna turbo the thing, there's not enough wheel spin for my liking.
#14
Instructor
Thread Starter
LTFT Trims went nuts
yeah so..what the fun sticks happened lol? Take a look. Reloaded an older tune with the same VE table...and this happened. I then went back and loaded the one used in the WOT scan..did the same thing. Any ideas????
#16
Instructor
Thread Starter