I purchased my car about 1.5 years ago in Costa Rica and have had troubles with it since the first time I started it. I would really love to get to the root of this and fix it once and for all, so any help is greatly appreciated!
The current issue (and ongoing issue) is that the car will randomly not start. Also, the gas mileage seems to not be good.
I purchased it with a generic catalytic converter (and thus P0420 check engine light code - told that it was due to being generic). I recently replaced it with a new, still generic, catalytic converter as my car wouldn’t start - it would turn over, but not catch. The replacement worked for about a month or two but is having issues starting again, usually if the engine is hot, at least for now. Last time this happened, the car eventually would not start at all.
In the past month, the spark plugs were cleaned and calibrated, along with a fuel injection cleaning treatment and oil change.
It’s worth noting that Costa Rica has low quality gasoline. I didn’t know that I was to purchase Super instead of Regular until recently, but even after the fuel injection cleaning treatment and staying with Super gasoline, the problem returned.
I’ve also had the fuel pump and spark plugs replaced about a year ago.
Thank you for any help!