Idling rough when jumping TE1 and E1 Options

[1994whitecelicag...]

Hey All, I would like to ask for some help. I was trying to check my ignition timing before I went for a smog check. But when I jump TE1 and E1, the car starts idling really rough and would almost die (did one time too). Would anyone know where I should start looking? The car idles and drives perfectly fine. I did take apart my car when I replaced the head gasket. But I had a neighbor was is a mechanic check the camshaft and crankshaft timing. Thank you in advance.

[Special_Edy]

Jumping te1 and e1 sets the timing to base. The ignition will still advance with rpm increase but it is otherwise locked out to ecu adjustments.
If your base ignition timing(your distributor position) was incorrect, the ecu will automatically adjust the timing to compensate based upon knock sensor and other readings. By jumping the connectors it can no longer do this and the engine may run rough as a result. Make sure you set the base timing, 12degrees Before Top Dead Center is the spec for my federal emission 94 GT, it should be on the emission label under the hood.