I have replaced the plugs, wires, cap, rotor, and air filter. The Service Engine light is still on. The engine is running rough and the smell of fuel is present.

1995 chevrolet suburban k2500 v8-7.4L-the fuel pump is continuously running-have check fuses/relay-with relay pulled out vehicle still runs, battery dead over night,check lines there are no leaks. what else can I do and what is making the pump to continue to run all the time?

how can i change a ignition lock on a 1995 suburban.

What is the spark plug gap.

pressed hazards on then off and now i have no tail brake signal. also turn signal only works when hazards are in on position, but no hazard lights. could it be the box that the signal switch is connected to under steering column cover?