A: I would assume that car of this era uses a distributor cap and rotor. I would firstly replace these components as they are tune up parts anyway and are not expensive. When you remove the old cap and rotor, look for carbon tracks and scoring in the cap. I would also replace your plugs if they look carbon fouled or worn.
Stupid question but have you checked your battery voltage?
Next I would check the resistance and voltage at your ignition coil.
Q: I have a 84 Jimmy 4x4 S15 2.8L engine 2bl carb
the engine was replaced with a 1986 2.8L
the 86 carb was not installed the 84 was put back on.
I'm having trouble smogging, diagnostic reads
carb, catalytic converter and 02 sensor.
Am I wrong in suspecting the 84 carb (2BLL)will not work with the 86 engine (TBI).
Ali (email@example.com) What top do what to do!
A: This should be an okay swap for you. I would look to the timing settings and also for vacuum leaks, etc. Use the distributor from the '84 with the '84 carb, etc. The readings must be from a very rich fuel charge. If the carb and manifold were set on it's side or upside down while off the '84, this will sometimes allow dirt in the carb bowl to flush backwards through the carb and it will now need a rebuild. Ed