1988 300zx NT, Erratic to low idle, bogs on acceleration, backfires at times
I have been having this problem with my 1988 300zx non turbo. Check engine light would turn on and
off frequently, then stays on. So I changed fuel filter, plugs,cap,and rotor, when I did my oil change. still
gotta do the spark plug wires. Car runs very rich and wants to die sometimes when i let off the gas. the
idle is very low and fluctuates from around 600 then drops to around 300 (back and forth) When I turn
the key I have to give it gas to start. It'll run fine for a second until i get to about 25mph then the rough
idle comes back and makes everything shake. Even after I changed the plugs there was black deposit
buildup above my exhaust. Help Please!