- Possibly, but probably not. However, a mechanic can check the functioning of the cat with a vacuum gauge.
- Sort of. Instead of a fuel injection problem, I think it is much more likely that you have a fuel filter or fuel pump problem.
If you have not changed the fuel filter in the past 3 years, I suggest that you do so, as your symptoms match those of a partially-clogged fuel filter. Even if this does not relieve the symptoms, this is necessary maintenance for prevention of more expensive problems.
What type of more expensive problems? Well, running an engine with a partially-clogged fuel filter will eventually kill the electric fuel pump. So–it is even possible that you have both a filter that is overdue for replacement and a failing fuel pump.
Change the fuel filter and then report back to us!