I live in a small house next to a smallapartment building. The apartment only has like 5-7 tenants. It's a weird setup, I know, but it's common around here, mini apartment buildings on residential streets. So I have no landlord.
I asked him before. I spoke to him once or twice and left a letter. And I was super polite both times. Way more than others would be. I asked I didn't demand. The first time I asked was a couple years ago when he had an even more annoying car. That one was not only as loud as this, but it had this super high pitched squealing it would make that would penetrate your bones. It gave me literal migraines. He'd let it run even longer back then. That car 1 hours was routine, not only sometimes like it is now, and 2 hours was sometimes. So I went out and asked him and he said "I need to let it run or the engine will crack." And that was it.
I did speak to him a second time much earlier this year like April or May and the car was running for well over an hour, and I went out and he said "Sorry man, I just forgot" and he turned it off and went back inside. Like.. what does that even mean? Normal people turn a car on and you know... drive it. How do you turn a car on and forget you were gonna use it? But that's what he said. After that I just tried to ignore it, while being awakened and annoyed literally every single day and then Thanksgiving I had my breaking point, because I was up late with friends and family, and I was in pain, didn't fall to sleep until 5 am and he wakes me up at 7 and had his car run until 8:20. So the next night I wrote a letter, very polite, and ASKED not demanded him to not let it run more than 5 minutes if that's ok and said I don't understand why he has it run for over an hour, if he can explain it to me I'd love to speak to him. Nothing.
And then a couple days ago, he let it run 3 seperate times for an 45 minutes each between 7 and 9. Only one of the times he used it, the other two he came back out and turned it off.
But "I'm harassing him" and what he's doing is perfectly normal. I asked on a car forum a couple years back when this all started if this was normal and said hey if I'm in the wrong please call me an idiot and tell me I know nothing about cars and this is totally necessary. To a man, every single reply said the neighbor wasn't making any sense and there's no reason... none... to let a car run that long everyday. Some dude who lived in Alaska replied and said he lets his run only a couple times a week for like 5-10 minutes and their winters are WAY more brutal.