92 RS, 305TBI. Car is running really rough, feels like either spark is intermittently going out, or the fuel is. The tach goes haywire and the engine light flickers, but no code shows up when I check it.
Fuel; the fuel pressure is just shy of 12psi, where it should be. I changed out the purge solenoid and the charcoal canister, as well as the o2 sensor. The injectors spray evenly without interruption. When I take the gas cap off, there's no release of pressure, but the gas cap is new as well.
Spark; I changed out the ignition module, cap and rotor, wires, plugs, and the ignition coil.
The problem still exists. I just started it up and it was running rough like there's an interruption somewhere. The check engine light flashes and the tach jumps all over the place. Help???