Spark Plug Problem

[FloridaSvt07]

I recently installed some NGK TR6 Iridium plugs on my 03 cobra before I went to get it tuned. I gapped the plugs at .032 and it has been idling funny ever since. It keeps moving the rpm's 800-1k. Before I put the NGK's in the car idled fine and was steady at 800 rpm's. Any input as what to do? Thanks.

 

[CobraKid04]

also would like to know. I think the gap needs to change to like .036 or something... I think...

 

[FloridaSvt07]

Ya I was thinking to move the gap up to .034, but I'll see what some other people think first. I told the tuner I gapped the plugs at .032 and he didn't say anyhting was wrong with that.

 

[Hockeyman48]

I'd temporarily gap at .040 and see if that corrects idle issue. If it does let tuner correct issue

 

[FloridaSvt07]

Well I really don't think it had anything to do with the tune since it started beforehand.

 

[FloridaSvt07]

bump anyone have any input?

 

[FloridaSvt07]

Anyone??

 

[Grandmarq86]

Have you tried opening up the gap some?

 

[FloridaSvt07]

Have you tried opening up the gap some?

Not yet, Im running a 2.76 s/c pulley with BF idlers making around 13+ pounds of boost. I thought .032 was the right gap but I could open it up to .034 and see...

 

[jm@ReischePerf]

I wouldn't expect .002 gap to correct that problem, you may have a bad plug, damaged electrode or coil issue. Pull all the plugs, exchange them for new ones. Gap should be .034-.036 for that boost, but be very careful when regapping platinum/iridium plugs, it's very easy to damage the tiny electrode.