Misfire codes

[02blacksi]

My car has been running weird lately. I just ran the codes and got 4.

P0300 Random Misfire
P0302 No. 2 Cylinder Misfire
P0304 No. 4 Cylinder Misfire
p0420

I just put new plugs in her last saturday(oem plugs) and took it to the muffler shop because the exhaust kinda has a echoing sound. They said there were no ehaust leaks, but that the muffler looked old and the insides looked worn out. Anyway what do you guys think the problem is with my car? Coil?



MODs: I/H/E

[talonXracer]

Reset the ECU and do a idle relearn.

[02blacksi]

Reset the ECU and do a idle relearn.

we reset the codes, but how do you do a idle relearn?

[02blacksi]

no replys? Gonna do a compression test tomorrow and go from there.

[SyckSiR]

idle relearn is basically this:
turn over engine. hold engine (under no load - park or neutral) @ 3000 rpm for 5-10 mins (till the fan turns on) then let the engine idle for 5 mins....

[02blacksi]

well theres no need for idle relearn, just looked inside the head and the exhaust camshaft has one lobe that is worn out into a U shape. The rocker assembly under the worn lobe has a roller bearing mess up. So im looking at my options at fixing all this.


ps. anyone got a head for sale? lol

[02blacksi]

so wait.. you blew your head??


A lobe on the camshaft is worn to the bone. Also rocker assembly is messed up.



http://i85.photobucket.com/albums/k70/Blacksi02/Camshaft.jpg

[Bificus]

Dang another cam failure.