code numbers show up as P0340 and P0341. its running rough at idle and sometimes dies shortly after starting it and putting it into gear along with recent start up and driving when coming to a stop it would stutter and die as well. and now it makes a ticking noise that gets louder the longer it runs it sounds like a lifter is getting stuck but I'm not sure, also i was doing some more research and when its running, i pulled the dipstick/oil cap off it would loose pressure and start to stutter and act like it wanted to die, and finally the first problem i had was that the RPM's would go up and down shortly after starting it as i would drive to work and it would seem i would need a new dv? please let me know any definitive answers for fixing these problems thank you!