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Re: 01 nightmare
OK, first take two aspirin, and call me in the morning....you can't be butting your head against walls....
I said check for back pressure, because if this car was misfiring, it could have damaged your cat, which could be partially blocked and cause lack of power....
With a 3.1, you do the basics.....
Has theis vehicle been losing coolant?
I assume the vehicle is still misfiring? If you drove it while it was misfiring, did the CE light flash?
Did you check for spark on all six cylinders with a spark tester?
You changed plugs and wires...did you use OEM plugs, and check gap before installing? New wires? Did you run the wires to the correct plugs and coil terminals? Did you notice any carbonning/corrosion on any of the coil terminals?
You replaced injector #2? When you removed the upper plenum, were the harnesses ok? Mice like to build nests under there and eat the insulation on the harnesses.....did you check injector pulse to each injector while you had the plenum off?
Did you check fuel pressure at the fuel rail?
If your exhaust is plugged, partially plugged at the cat, you can do several things...remove the O2 sensor(one before the cat) and install a gauge to measure back pressure....should be less than 1.25 psi at idle......you can also disconnect the O2 sensor, remove sensor and drive it a short distance....this will be loud of course, but if power has returned, then there is a blockage....
Usually, when a cat is partially blocked, if you start from a dead stop, and then lay into the accelerator pedal, and the car revs high, and doesn't shift, and bogs down, come to a stop.....now, from a dead stop, very lightly accelerate, if the car slowly gets up to speed and shifts, this is an indicator of a plugged cat.....
Main thing though, if the car is misfiring, that has to be taken care of first....
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