RICH AFR AT IDLE

[Zayuh_ray]

What's going on guys, I have an issue where i cant seem to find what the hell is going on with the car running rich.
Mods list:
3 inch corksport intake
CST4 turbo
Upgraded 340 AEM fuel pump
Autotech internals
JMF V2 intake manifold /w port injection /w returnless set up
Stock exhaust manifold
CPE downpipe /w full cpe triton exhaust
Injectors were clean and sealed by PDTuning
PRV is brand new from Edgeautosport
FMIC from treadstone
2x catch cans

Quick run down, I've been running rich for some time now and my STFT is at -25 at idle. I've thrown everything brand new at this car and just cant figure it out at all. Cleaned injectors, new prv, new this and that. Everything fuel wise is brand new including sensors. I've done boost and smoke leaks tests and came up with nothing. I've done the key on/off test for the prv, check the cylinders for the mist spray pattern in each cylinder, new clamps on all boost pips and anything that revolves around vacuum lines. I'm posting this logs as well to show what its sitting like at idle.

 

[Crazycanadian]

If you are confident the car is mechanically good then you'll need your tune looked at... The MAF Voltage looks ok but you're showing 4 -5 g/s... you should be closer to 2.3 - 3.5ish...

 

[Zayuh_ray]

If you are confident the car is mechanically good then you'll need your tune looked at... The MAF Voltage looks ok but you're showing 4 -5 g/s... you should be closer to 2.3 - 3.5ish...

Could this be a MAF issue than? I’ve swapped it before to a junkyard find MAF and had someone say the same about the other as well. I know someone with a good running speed, should I swap with him?

 

[Crazycanadian]

Could this be a MAF issue than? I’ve swapped it before to a junkyard find MAF and had someone say the same about the other as well. I know someone with a good running speed, should I swap with him?

No.... Your MAF out puts a voltage signal. That looks within a range I'd expect to be normal.... The ECU interprets that signal into a value that gets used for fueling.. That value looks to high... This requires a tune to fix...

 

[Zayuh_ray]

No.... Your MAF out puts a voltage signal. That looks within a range I'd expect to be normal.... The ECU interprets that signal into a value that gets used for fueling.. That value looks to high... This requires a tune to fix...

Got it! ill have to talk to my tuner about it next email. But for now i did take some logs from a suggestion from someone in the speed community to load a previous tune where the car ran fine and to see if the AFR would go back to 14 AFR or somewhere better than where I'm at currently. Loaded up that tune and the car runs better at 13.96-14.26 AFR. I've got 3 logs here showing the car sitting at near good range and my mass airflow was sitting at 4!