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This could save you headaches
i wanted to add something to this thead of overlooked items:
The MAF sensor
I had the typical sluggish performance, hesitation, gasping for air, hard to go up hills. I replaced the Plugs, wires, cap, rotor, PCV, fuel filter. i should have stopped right there and confirmed a bad MAF, but the voltage was right on. So i kept going replacing the Cat, the muffler, the O2 sensro, trying different fuels.....on and on. Until my buddy who drives a Blazer by chance mentioned plugging his MAF into my truck, i said what the hell, and it drove like a million bucks. I can only assume that it was intermittently failing. One way to tell if this is the problem is the burnout. If you cant even hold the brake and burn out without it sputtering you probably have a bad MAF. Well i hope this finds some desperate person well.
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