Hello! For the past couple months I have had a check engine light with codes P0300, P0302, P0304, P0306, and P0171. So the whole front of the engine is randomly misfiring and I am stumped. I have replaced the plugs, coils, vacuum lines, egr valve(which was also throwing a code), run sea foam, and probably another thing I am forgetting. It also takes a bit to start. If I let it crank for a while, it will start, but starts before then if I open the throttle. I tried a trick and turned the key to "on" to let the pump build up pressure and it had no effect. I do not want to keep throwing parts at it and hoping for the best, so I would appreciate it if I could get some help to diagnose the cause. Thank you.
have the same problem?
Tuesday, March 28th, 2017 AT 10:57 PM