[Beav]

You've got a serious fuel problem, it's readily apparent from your post in another thread stating that your tailpipes are black and sooty inside. That can only indicate raw, poorly burnt (or un-burnt) fuel.

If you're convinced you've checked all the basics that your abilities allow I'd suggest bucking up and taking the car to a driveability specialist. Remember, if there's that much excess fuel coming out the tailpipe there's also going to be excess fuel washing down the cylinder walls and going past the piston rings and diluting the engine oil, which doesn't do the bearings much good either.