I just got a 2000 s10 with a 4.3, it starts and idles good. If i try and give it to much throttle to fast it bogs in park or driving. I checked the fuel pressure 60psi with the key turned on and 52 while running. it throws the egr code and thats it.
Mass air flow senor, used some cleaner on it runs like a champ
Replace the sensor located in the tube from air filter. Cost about $90.00.
I have the same problem :I have the distributor stile ignition system.I was told by a old school mechanic that Chevys have that problem regularly. He suggested turning my distributor slightly. I will let you know how it goes.
I cleaned the mass air flow senor, ran like a champ.
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