Someone please help. I have a 1996 Chevy S10 Blazer 4.3 4wd 4 door blazer.
Lately I have been having problems with the power. I can't seem to get it
up to speed on the Highways and up hills without it down shifting into 2nd
gear bringing the RPM's up to about 3500-4000. I replaced the spark plug
wires, rotar, distributer cap, and fuel filter and this does not seem to
have helped. Does anyone know what could be the problem? Also, there
were a couple of different auto parts dealers that stated a specific type
of spark plug has to be used on this vehicle and some say it doesn't
matter. Does it or does it not and if so, could this be the problem?