• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Issues while data logging, getting ready too tune..

blknbstd

blknbstd

New member
Ok ill start with mods.. 04 compg 130k Headers no cat, k&n hai, 3.6, 104 and overkill tune. Ive added water/meth with a do3 nozzle.

Went to get tuned an my tuner watched trims an what not at first and started doing pulls, My AFR would float around 10.2-10.8 with a injector duty cycle around 80%? But as the rpms went higher my afr began to lean all the way out and injector duty cycle went too 120%.. were both kinda at a loss on whats happening, i gonna change my fuel filter, try and grab some lower miled injectors, mine have 130k an go from there.. were kinda thinking a injector about to take a **** or has and or the fuel filter is clod..
FYI we haven't change anything in the tune yet..

any insight would be great or if your needing info i didnt post i can get it...
 


Fuel injectors aren't likely the issue.

Sounds like your pump may be weak, underpowered or partially clogged fuel filter. Or..you are running out of injector and need to upgrade.
 
Is it a wideband reading or a narrowband reading?

Your fuel system is a bit different from the 97-03's so you have to account for that as well.
 
I have a aem wide band.. also have the zzp rewire on the fuel pump. Just got a GM fuel filter an will put it on after work today. Also have a fuel pressure gauge I'm gonna hook up too the rail an watch as I do a pull
 
dont trust the IDC numbers on 04+ cars.. The calculation that gives you that number is wrong on most all scanners.
 


idc = injector duty cycle
ipw = injector pulse width

the calculation for idc% is based on the IPW value vs rpm.... The IPW value is reported incorrectly on most scanners on 04+.
 
oh.. the idc we were watching was on hptuners not my aeroforce.. Also I believe i cleared up my issue, I changed plugs, cleaned my maf and connectors and throttle body/connectors ran some sea foam through my tank then put on a new oem fuel filter.. here is my pull with the updates.

GTP PULL - YouTube
 
Hard to see the video but if I'm seeing 10.9-11.3 on your wideband at WOT that's bang on to what I'd want to see. Looks good.
 
You must log in or register to reply here.
Back
Top