Hello I was changing my spark plugs.
Took of upper intake manifold to get to rear ones. Replaced plugs with NGK.
Everything ran great for a day.
Then I had p0170 and P0305, fuel trim malfunction and cylinder 5 misfire. Car would drive great but in park and idle it would shake felt like vacuum leak.
Then it would do a bunch of random misfires, P1300.
Now I put in new pcv valve and some new vacuum hoses and the only code I get is p0170.
Now in just D idle car idles at 700 rpm and feels great, in Park it idles at 700 and goes whoom whoom.
So what is causing my p0170? I checked hoses 100 times, intake is good, I had same error code few years ago, and fixed it by replacing cracked intake.
Is it vacuum leak that I can't find? if so, is there some simple way to figure it out, without some smoke blowing devices or infrasound or something similar which I googled.
Thanks in advance!! I want car to have no Check engine Light before I do more stuff