I've had two factory fuel pumps go out in the last 4,000 miles. Last night I installed the walbro gss342 in tank fuel pump. BTW, all this was going on before the fuel pump swap and I thought it was the culprit. Here's a few questions, My car is stuck in limp mode when cold(first thing in the morning, etc.). My primary o2 sensor is reading 5.111 volts. I know that is ungodly rich more than likely even impossible. The reading used to be .030 upon just starting up and would work it's way through the A/F spectrum up to .990. The 5.111 volt reading is throwing me off. I hoped it was the fuel pump, but it's not. Now on cold starts the A/F will work it's way down to normal readings faster with walbro installed, but it's still not normal. I've replaced the primary o2 sensor, it was not the problem. I've checked the engine coolant temperature sensor voltage and it's correct. I've checked the MAF sensor voltage, it's correct. I know some of you are wondering why I haven't hooked it up to an obd-ll scanner, my car will not read on it, I've tried 4 times. I am boosted, and I need some help to figure this thing out. All suggestions are greatly appreciated.
mike
mike