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Title: P2234 Signal Shorted to Heater Circuit and other problems see post #4 Post by: BlackT on June 22, 2022, 12:42:55 PM I am getting this error on 4.2 MPI ME7.1.1
4F0 910 560 It use LSU 4.9 I try everything, few difrent LSU, new wires to LSU,second ECU. Now I try it on bench I only connect to ECU: RPM signal and LSU. I simulate AFR with LPG from ligther I am geting all time this dips on WBO signal, same is on car. There was bad WBO on car, maybe it fired both ECUs? Title: Re: P2234 Signal Shorted to Heater Circuit Post by: BlackT on June 22, 2022, 12:46:28 PM And this is on car
If I discconect wire to LSU heater I dont get this dips Second bank work without problems Title: Re: P2234 Signal Shorted to Heater Circuit Post by: BlackT on June 23, 2022, 04:41:44 AM This is getting more strange.
So all time I have problem on BANK 2, I was sure that is something in ECU on that bank. But today I connect bank 1 sensor to bank 2 connector on ECU. And is working, there is no dips How is possible that I have 3 used LSU sensors, with same problem? It is no problem to put new sensor, but I am afraid to ruin it. If something else is problem Title: Re: P2234 Signal Shorted to Heater Circuit and other problems see post #4 Post by: BlackT on July 03, 2022, 11:55:49 AM This is getting more weird and weird
Soo on Bank 1 at idle I have all time lean mixture, and no mather how much I add fuel it doesn't get to 14.7(fuel pressure tested is okay). Like one cylinder is not working but I don't get any missfire detection. And I can feel in car like is not 100% smooth idle First strange thing: When I put my extrenal AFR meter in bank 1 exhaust pipe(back of car), I get AFR reading of 20:1(like free air) If I put metter in other pipe It read around 15-16 AFR Why second O2 show 0.45V, they are dead or what? when I drive car,at WOT AFR is good, but... I read only 145 g/s at MAF. TPS is 100% open, AIR filter is new, car goes like it have 180HP Can this be problem beacuse I turned off VVT. I dont think so Also It have this peaks at MAF reading Car dont have CATs I try another WBO and still have this dips, all that WBOs work without problem with extrenal AFR meter Title: Re: P2234 Signal Shorted to Heater Circuit and other problems see post #4 Post by: BlackT on July 03, 2022, 12:43:06 PM and here is WOT
Title: Re: P2234 Signal Shorted to Heater Circuit and other problems see post #4 Post by: BlackT on July 06, 2022, 06:11:16 AM Maybe this can explain some things 8)
Every piston have this nice kiss |