I have a Pontiac Firebird Formula(1994)......we used a gas can that had just a little diesel fuel, when we ran out of gas...(did not realize). Filled the car, ran that tank threw. Added some fuel cleaner, and now the car is missing when in gear moving , kind of bogging out while in gear, loss of power.......Any ideas on what we may have done? Should I change the entire spark plus? Any ideas are welcome
