okay so I just did my tune up. I drove the truck yesterday and it drove fine. everyone keeps telling me that the timings off. but I have everything in the right firing order and now its not starting its back firing and now I have smoke coming from under the hood. the spark im getting is an orange color. the truck is acting like it wants to start the motor turns but it wont completely start. please help!
just changed spark plugs, cap, rotors, and wires. the truck ran fine and started fine just yesterday.
Chevy C1500, Motor350 5.7 V8.