I have the codes p0303 p0304 and p0300 I’ve changed the coil pack and spark plugs I’ve cleaned the throttle body I’ve changed crankshaft position sensor I’ve thrown just about all the money I can at my 2000 jeep, it was my grandmas first new car and it’s been in the family since 02 (for reference I was born in 04) and when she got a new car she gave me this one as a project to get myself around it has 260k miles and is an automatic (recently moved home with parents after living with a now ex) and I’m playing hell trying to clear these codes, I don’t have infinite money and shops want $400 just to look at it the jeep itself has the late 99 4.0 motor in it, it idles rough and has a hemi valve tick sound coming from the top end and gets really rough driving and accelerating anytime it’s not between 17-2200 rpms any ideas on what it could be?