I have a 2000 siverado with a 4.3L with 110000 mi. It started acting up a month or so ago, by not having the power it should under full throttle condition. It acts like it's missing on 1 or more cyln. When I put the scanner on, I get the codes for the O2 sensors being low voltage, which I know is a lean condition. But I have changed the sensors, and no progress. I have replaced coil, plugs, wires. I don't have a fuel pressure gauge to check the fuel pressure. But I have had the FDM changed a few years ago. I am the orignal owner of this truck. Could it be the injector? Any help would be greatly appreciated. I have also unhooked the MAF sensor and tried to run it and there is no difference. It also starts hard. What I mean is I turn the key and it will fire and then quit, some times I do this 6 or 8 times or more before it will start. And when it does start it runs rough for a few quick seconds and then idles fine. But if I don't let it run for a minute or two, there will be no power when accelerating. Thanks guys the help guys.
have the same problem?
Wednesday, October 3rd, 2007 AT 4:59 PM