I have a 1986 Chevy Camaro. The previous owner put a 1979 Chevy 350 truck motor in it. It was running fine when i bought it but after a while it started stalling on me while it was idling. Also, when I start going up inclines it bogs down and has trouble up the hills. When I am stopped at red lights the RPM's fluctuate and so does my battery gauge. It isnt running right and seems like it is miss firing alot. I have tried fuel injector cleaner, octane booster, a new battery and new spark plugs. I have no idea what it could be do you have any ideas?

 

check the Alternator, check your timing, fuel mixture, check make sure the Sparkplug wires are in correctly and not mixed up.