2007 mazdaspeed6. So for the last few weeks ive had a random/intermittent stalling at idle. I've done some searching and have replaced a few parts. From the beginning when I bought the car It had cel p2188 (system too rich at idle) car had ran great for 6-7 months before it started stalling at idle. In my searcg for answers I've replaced the fule pump relay(fuel pump speed control relay) and the fuel pump resistor box. After those were replaced car cranks right up and idles fine annnnd the P2188 cel is gone. This lasts for like 3-4 days then the stalling happens again and throws the same CEL. I've cleaned the MAF, no help. I have another in tank fp to try and swap do to some advice from someone on a Facebook group that had simalar/same issue. Odd thing though while looking at my access port everything seems good and nothing changes right before the car stall but I did notice that the hpfp sensor voltage is not reading any volts it stays at 0 volts regardless of rpm, speed or throttle position. But seriously I'm at my witts end and need some help.