I got a 97 Firebird and had a heck of a time trying to get it running smoothly, jackasses at Autozone sold me Platinum plugs when it takes AC Delco Iridium plugs, changed those out along with the Wires and all was well. If you got Iridium plugs then make sure a wire isn't toasted, if you got Iridiums and your wires aren't toasted then go with new ignition coils. And if it still does not work, Throw it in the Gutter and go Get Another!
Having no catalytic converter installed is illegal and can cause a myriad of problems. Probably not a backfire though.
As with any engine, timing, and also carb problems.
Yes, it is. Like any website it occasionally has it's problems, bugs and glitches but everything always sorts itself out as soon as possible.
Yes, it will backfire quite a bit, possibly stalling. This will foul your plugs.
Question way too vague, need more specifics
backfiring is a sympton of a lean condition. look for vacuum leaks and fuel delivery problems.
Yes ... although there occasionally are problems
Something will backfire. I would think that there would be fewer opportunities for people to emigrate to the US.
Some minor problems can be muscle stiffness, sore breasts (both occasionally) but nothing too serious.
The three possible types of modification problems are: Deletion, update, and insertion problems
I believe you mean attributed, but it greatly depends on the machine. Of course, the starter is affected, as could be the anti-backfire solenoid. Another possible place affected would be the PTO if it has an electric clutch to engage the deck.
Very, but occasionally, it has a few problems but dont worry about those, they rarely happen.