Hi,
I own a Volvo s60 2004 2.3l t5 when I start it, it goes to 1200 rpm and then goes down to 750 rpm on idle.

I had some issues with it like stalling on stops but just a few times and sometimes it just won't start the engine is rolling but it doesn't start. it takes between 10 to 20 times before it starts.

So I think we figured out this problem by changing the MAF, cleaning the selenoid, camshaft sensor, and the o2 sensor and changing the Maf sensor. But it stall again this time I restart it first shot no problem. My dad has a Volvo s60 2.5l t5 but it start at 1500rpm and then goes down to 650 rpm. So I think maybe that my problem is cause the idle is low but we touch everything that could be the problem.

what ya'll think about it? we've rebuilt the whole engine since the timing belt broke, 2 years ago.

thank you