rwarden90

So I have an 06 with headers and lately I've been having a stuttering problem at certain rpm (1500-2000) every few days while driving.It will stutter for 30sec-2 min then it'll go back to normal. This a very inconsistent problem so its hard to replicate.Also the computer says its a misfire but i replace the plugs and wires still look brand new. Any Ideas would be welcomed?

eddiewever

Plug wires can look new but it doesn't mean they're performing as they should be. Most common problems on ignition misfires are caused by the wires ( if the vehicle is equipped with such system). Vibration, heat, and multiple disconnect/reconnect of plug wires increase the chance of a failed wire. I'd replace wires as it sounds it could be the problem. Its possible to pinpoint the cylinder misfiring if you have a scanner that has the ability to monitor cylinder misfires at they happen.

heavymetals

iTrader: (3)

Your headers could have worn through the insulation of a plug wire or you may have not plugged it in all the way (common).

rwarden90

alright i'll do another check the stutter/misfire will go away if I let off gas for a few seconds as well

punishmentcycle

iTrader: (6)

our header designs are very tight and cause alot of heat around the plug wires..i had a couple wires go bad on me when i first installed my headers.. i went with msd wires as they have the bendable ends so i could bend and twist em as far away from the headers as i could...i also used coolsox.. give it a try

rwarden90

IS it the msd super conductor wires that people are using?

punishmentcycle

iTrader: (6)

i believe so.. its been a long time since i bought em but i just bought the first set of ls1 msd wires i found.

rwarden90

just a though since my wires look good could it be my tune since i never gt a retune after headers

punishmentcycle

iTrader: (6)

Unless its running really lean and u burnt a plug. I'd pull the plugs and take a look at em

rwarden90

just put new ones in less than 500 miles ago

rwarden90

also could someone lnk me the wire set the chose so i dont eff it up

rwarden90

so i did a continuity test on my wires and my average for the stock wires was about 800.So a bit bad. I also logged a little data while it was happening and it says cylinder 1,4,6,8 are the culprits with cylinder 6 having the highest misfire count. Also my fuel trim on bank to was in the - negatives . No idea what that means. Any ideas?

rwarden90

also idont nhave rear o2's turned them off from my tuner

rwarden90

ummm anyone

punishmentcycle

iTrader: (6)

what codes besides the misfire? the rear o2's being left on will on throw the" below cat eff" codes. sounds like u have a bad upstream o2 to me but that wouldnt explain the cylinder 1 miss fire.

change those wires and have the tuner look into the bank 2 o2

rwarden90

yoou think I should change both and hope for the best

rwarden90

also now it seems to almost entirely from the 6th cylinder

punishmentcycle

iTrader: (6)

whats the plug on 6 look like and take a pic.

rwarden90

just put the plug back in its brand new exept for a black ring(carbon) around it less than 1000 on it

punishmentcycle

iTrader: (6)

shouldnt be black.. brownish is what your looking for. you very well might have fouled the plugs due to being rich.. when u had it tuned what was your AF ratio? are u running cats? this all started after headers and a tune correct?