Retime the distributor. Turn piston # 1 to TDC on firing stroke and note if distributor rotor is pointing to # 1 cylinder. Some remand distributors are installed 180 degrees oposite so the firing order would be out.
If engine had been idle for extended periods, check the compression. They could be low due to the cylinders drying out and does not have any lubrications to seal the piston rings. Remove spark plugs and pump some engine oil into cylinders. Crank the engine for a few seconds and reinstall spark plugs and retest.
Monday, January 4th, 2021 AT 12:30 PM
(Merged)