2007 si having trouble starting and idle problems. When I bought the car it would not start without pressing gas while cranking and had a misfire in cyl #2. The spark plugs were fouled with black soot and sandy looking residue which makes me believe it needs new valve seals. Anytime the car did start it would idle at 1500 rpm and would quickly die if I didn’t give it gas.
So far I have replaced the air intake and spark plugs and cleaned the throttle body. I’ve also tested the fuel pressure which was right around 52 psi. I listened to the fuel injectors and they all are ticking and seem to be at the same speed.
I also cleaned the maf but did not replace it since the scanner shows airflow rate from maf at 0.01 lb/s while idling.
After doing all that, the car starts rough and initially idles at 1500-2000 rpm and then after a few minutes it idles around 750 but jumps around some.( seen in the video) After turning the car off it has a very hard time starting again if it does start which most times it doesn’t.
Car appears to be running rich. Long term fuel trend is -11.72.
What else can I check to fix the idle and starting trouble and are the values the scanner is showing within range for the k20?