Hey there, I've been working on my sc400 and keep getting shuddering and stalling when driving. The car runs extremely rich and idles all over the place too. Ive replaced the maf sensor twice now and still nothing. The wiring harness appears to be in working order too. I'm getting check engine codes 22, 24, and 31 saying all of these circuts are open or shorted. I'm loosing my mind and the mechanic says its the maf too but obviously it's not as theres been two different units installed with little to no change. The car also still runs like crap with the maf unplugged. Some help would be greatly appreciated. Thanks.
