where does this wire go?

[amrjohal]

I have 2000 chev impala with 3.8 L series II , started misfiring #6 and i took the cover off and noted this wire. does anyone knows where it plugs in? (wire is pointed with red arrow).

Secondly, my major prob is that # 6 is misfiring, code which comes is P0306 # 6 misfire. i changes spark plugs, checked wires, coils all are good. engine light is on and starts blinking when i drive it. car runs well and gets smooth as it passes 60kmphs. ideling is rough. exaust gives rough sound. compression test on #6 reads zero.
thanks in advance

[pmaniac69]

I think that plugs into the alternator

[amrjohal]

i also suspected that, but found that there is another bunch of wires already pluged into alternator

[86FieroSEv6]

I have seen it before on several 3.8(K) powered vehicles, unused connector. You have zero compression on #6, check the rocker arms first, you may have broken a rocker mount or bolt.

[amrjohal]

thanks foero, i opened the rocker cover and found some new things (i got this car from someone with #6 already misfiring hoping to fix it) There was no lifter spring on this valve (in the pic). rocker arm is in good condition but the pushrod was bent ! i took some photos for you guys.
1) why did the pushrod bend ?
2) does the valve moves up and down a bit in this position(this i tried moving and it was jamed.) does that means the valve is bent ?
3) is that green thing a valve seal? is it in good condition?

thanks in advance

[86FieroSEv6]

Somebody "floated" the valves is my guess. Did you find the spring or retainer? In either case, this is looking very much like a cylinder head removal job. Good luck and we are with you if you have questions.

[Guest]

1) Because of mechanical failure
2) Yes, the valves move up and down, most likely yes
3) Yes, that is teh valve seal, no it looks damaged.

I would suspect you'll be into more than just replacing the head, since there is very likely damage to the piston. Sometimes and depending on how comfortable you are with running a damaged piston you can get away with leaving a damaged piston in place, as long as there are no holes, or the damage isn't severe.

[pocket-rocket]

Just remove sharp edges where valves made dents if they aren't too bad. Otherwise you get hot spots which can cause detonation. A sand paper flap wheel in a dremel works well for this.