Just off idle stutter, throttle barely open (SOLVED)
Update: Fitech support got me straight now.
I logged a quick 30 second start stop, start stop , backwards and forwards to get the stumble just off idle. It loaded and I’m looking at the spreadsheet, which may as well be in Chinese to me.
searching how to add the link ( drop box?) and will have it posted next
https://www.dropbox.com/sh/ygytflmoo9gorn5/AADWX_7eoqMVPyQ52KEpxpgUa?dl=030 Second backwards and forward to capture the stumble off idle
I'll take a look at that when I get home from work tonight. So what the heck was wrong with saving the log file before?
So like I said, I had to physically add the folder log_file to the lists of folders in the handheld once I got it open on my PC. The first run nothing transferred. Fitech has seen this before and had me delete the log_file folder and create a new one. This time it took and is all well.
I believe the issue was when I created the log_file the first time, I opened it and created a dashboard folder too. I got those instructions off a chevelle forum I think. Anyway the 2nd time I didn't create the dashboard folder. When I opened up the log_file the 2nd time, FiTech had created the Dashboard folder for me loaded with all the data.
I appreciate you being patient. I eventually get there, it just takes me some time and a whole lot of searching!
So this has 2 separate logs. The first is the "hunting" issue at cruising speeds, the 2nd is separated by a space in the spreadsheet and that one is idling around in Lowe's parking lot after a 30 mile drive and starting and stopping several times to catch the stumble on the just off idle issue
Yes, that's right, I noticed that also when I first put my fitech in.
https://fitechefituning.com/fitech-efi-tuning-forum-2/topic/my-build/#postid-1194
I'll look at your log files now.
Oh, your Target AFR is about 14.6 and your AFR Drv, which is the one changing, shows over 20 at times that you are probably noticing the hesitation. I believe that either you have a bad O2 sensor leak around it to the outside air, or it is bad. I would first check for leaks around it. Should have been welded securely with a tight seal.
Ok so I assume you are talking about where the sensor screws into my header? I got Kooks headers and they had the bungs already installed. All I did was buy new sensors and screw them in. The passenger side isn’t even plugged up on either end. I can check for leaks and if none found possibly swap out the sensors?
thanks for your input. I have the list of what each name is but what exactly does AFR DRV do? How is it affecting me?
If you only have one O2 hooked up, you should probably change that in your settings to only use one. The AFR Drv is suppose to be the driver's side O2 sensor reading. It would make sense that you would see an issue more at near idle when the exhaust flow is low, than you would at full throttle where the exhaust flow is high if you had an O2 leak. At near idle, depending on your camshaft, you could be sucking in air at the O2 sensor if it leaked around the exhaust, causing your AFR reading to be much higher (leaner) than the Target AFR, which is what the fitech is trying to achieve with fuel delivery. So the fitech would then dump fuel to try to richen it up, causing hesitation.
Alright, my installer ( certified installer) deliberately did not hook up but 1 sensor as he said it only needed 1. I assume he has it set for 1. I will check that and get it jacked up tomorrow and crawl under there.
stupid question should I crank it and use smoke to see if it’s leaking?