cylinder 2 missfire

[JayB98GST]

ok, at high boost and high rpms i get a missfire that lasts about 30 seconds or so after i let off the throttle. i got the cel pulled and it says cylinder 2 missfire. so i did a boost leak test and it sounded like there was a leak coming from the #2 injector seal. so i changed the seals and it seemed to help a little but i'm still getting a missfire. then i did another leak test and now it sounds like there is a leak somewhere under the valve cover. I just had the head rebuilt and the bottom milled and a new head gasket. anyone have any ideas what else might be causing this missfire problem? thanks in advance.

 

[Doug99RS]

What's the history of the plugs and wires as in how old and what brand of each?

Have you checked the resistance on the injectors?

Have you done a compression check?
Doug

 

[majik2k5]

If you do a boost leak test from the compressor opening on the turbo then you'll hear air leaking out. Do the boost leak test from the lower intercooler pipe for more accurate results.