I have a 1994 4.3 L V6 Silverado I was having issues with idel change the spark plugs the The rotor the cap And the plug wires. I was still having rough idle issues was driving down the road and it just died acted like it starved for fuel. also have replaced fuel lines fuel pump and the fuel filter I'm wondering if the catalytic converter could be clogged or if it could be the ignition coil any help would be greatly appreciated