random misfire after spark plugs

My car seemed to be loosing power within the last couple of days I just put in some NGK TR6's from zzp it said they were pregapped of course i didnt check them (duh) I went to autozone and the scanner said random misfire multiple cylinders so my question is this could this be caused by the spark plug gap????

could be that you didn't get the wires fully engaged onto the plugs. Also, did you do them one at a time so as not to mix the firing order up? I'm not a big fan of wiz-bang fancy schmancy plugs, never seen a set that did diddly-squat over standard plugs (other than platinum tipped, due to increased longevity). <---- just my 2 cents worth.

What mods have you done to the car,since those are 2 heat ranges colder then a stock plug.

~Larry~

i did the 3.4 pulley all the wires are on good i checked the gaps didnt do new wires (the autostores had to order them if i wanted them) i dont belive i damaged the wires...ive been using 93 octane gas... i didnt notice this happening right after the plugs mabey 1 or 2 days later... only way i see to go is put the old ones back and see if it happens... any thoughts?

Its either one of two things...on NGK plugs they have screw on caps that the wire push's on to and they may have become lose or a chance of bad plug wires....how does the car run a WOT???? Are you getting any missfires then??

actually i should have mentioned this its bad at WOT when i punch it thats when it happens it seems to be ok in the low end or even half throttle

when i punch it thats when it happens it seems to be ok in the low end or even half throttle


Plug Wires :wink:

AHHHH! whats wrong with them?? i went to pep boys and autozone and they both said they would have to order the wires autozone had like one crappy pair... what wires are good for are cars??

Id just stick with the ACDelco and you can get them from www.gmpartsdirect.com for $36.70 to your door and the part # for them is 12192421 . Just keep your foot out of it untill you get them :biggrin:

~Larry~

what made you say it was the plug wires? i rocked the engine foward when i did the plugs i hope i didnt F something up

Because it has happened to alot of use,after a plug change...and yes....even me.The car would run fine as long as you kept your foot out,but as soon as you put the pedal down @ WOT it would sound like popcorn popping :wink:

~Larry~

thanks... i let you know how it comes out

BIG-L
You have new plug wires? Now we can't race.
What happened to the new pictures?
http://img.photobucket.com/albums/v425/kustomkid54/1998PontiacGrandPrixGTP002.jpg

i ended up jsut grabbin some NAPA wires it seems to have fix the problem i went to autozone to get a diagnostic and they couldnt do it at night so ill just got back so i can get the SES light off THANKS