stangdriver2007

i just changed my spark plugs to NGK iridium IX and it seems like my car is sputter when it gets over 3000 rpm it seems like a power loss what could it be

02 Ninja

Was your car sputtering before you changed plugs? What mods do you have on your car? IMO, you should've went with standard Motorcraft plugs or the Platinum plugs. I believe those plugs are for F/I or cars that run nitrous, but I may be wrong. Do you have a scan tool?

stangdriver2007

it is a complete stock car and no i dont have a scan tool and it wasnt sputtering before

02 Ninja

Try a different spark plug! If it's bone stock you're waisting money with iridium plugs.

stangdriver2007

i put the old ones back in and it is sputtering still

stangdriver2007

it has like no power and it pops and backfires and sounds like crap please help me

stangdriver2007

im thinkin bad connection between the wire and plug but it seem like they are good

breagles

buy autolites . You don't need ngk's unless you're supercharged .

stangdriver2007

i have platinums in there right now and the car still backfires sputters and has no *****

01GTCONVERTABLE

Happend to me too...before I changed my plugs, and then about a month after I put the iridium ones in...I just replaced my 2nd plug on the drivers side and it cleared up agian... I think the boot has a bad connection in it, if it happens again that'll be what I do next.