Will

iTrader: (1)

Guys just installed the NGK tr-6's gapped at .35 and getting MISFIRE galore!!! Checked all plug wires and all are secure! What is up?! I have a 2000 Silverado. HELP!!! <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" />

1999stepside

Not sure, but were you the one IM me yesterday? If so, sorry I did not reply, I was not at my computer and when I click to reply, you were allready signed off.

Good luck, Kent.

Maxmumboom

Bad plugs?????? 99 stepsie-Kent do you have aol? whats your srceen name?

1999stepside

ktc00027

XLR8NSS

iTrader: (4)

Are the misfires on all the cylinders or just one?

I'm with Maxmum about the bad plug idea.

One thing I noticed when I put TR6's on my SS was that it showed a few more misfires on ATAP and idled a little rougher.

You might want to swap plugs on the misfiring cylinders to see if its a bad plug.

John

PS - Do you have the stock plug wires? If not put them back on, they are better than most aftermarket wires IMO. <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" /> <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Will

iTrader: (1)

Actually what should I use in Atap to tell which cylinders are misfiring? Also I was thinking it might be the .35 gapping.... I thought it just might be a little too small.... PLEASE HELP!! BTW, XLR8NSS do you have like AOL instant messanger or anything like that I would like to talk to you more about this.... Thanks alot. I would rather not pull out all the plugs if I don't have to. Let me know what you think about the gapping thing...

XLR8NSS

iTrader: (4)

I was going to mention that the gap might be a little too small. Try opening it up to around .040-.045 and see what happens.

I forget exactly where its at but, there is a section that has "current misfires" for every cylinder. You have to turn on every cylinder that you want to log. I'll check tomorrow and let you know if you can't find it. Check your misfires first. It might be just one cylinder thats causing the problem.

Sorry, I don't mess with IM. I had it at one time but, it kept screwing up my computer so it got deleted. PM or email me. I usually check them pretty often. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

I've been working around the house and <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> today so I don't know when I'll be up tomorrow. <img border="0" alt="[boring]" title="" src="graemlins/gr_zzz.gif" /> <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

John

Will

iTrader: (1)

Well man I tried gap @ .45 and still same thing!!!!! <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> I noticed every plug was black except for one! It looked like it hadn't been sparked at all.. One little black mark that;s all!! I am curious to know whether that could be causing it... But then I think the code I am throwing is P0300 which is ALL cylinder misfire.... <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

graygmc

is it misfire at idle or all RPMS. i have heard if it is at idle it could be a clogged EGR valve.

1999stepside

Didn't you tell me you trimmed the EGR tube? Maybe that could be the cause. Did you install the plugs before or after you did that mod?