shaolink9

i changed my plugs now my car feels off jus a tad lik a rough idle. i gapped them to .40 and checked to see that wire and plugs were tight its very very slitght miss or pop mybe exhaust leak? car runs fine off idle dries great and flys up top. not sure if its new or if i just noticed.

*98TransAm*

what kind of plugs

snake charmer

iTrader: (118)

sometimes a bad plug is not going to be bad enough for the car to throw a code . if you can feel it though you might have a hairline crack in one of them . might want to take plugs back out and check each one of them close . it is real easy for a plug to get a crack in it from being dropped by a stocker or even over tighten just a bit . good luck

shaolink9

thank u bro

shaolink9

they are tr55 plugs btw

2001NBMZ28

TR5 or TR55? I've always gapped my TR55's (3951) to .055, stock is .060 in the owners manual. NGK's site says .040 for the TR5, is that what you meant to post? Notice they don't list the 3951 for our cars anymore, think it has something to do with the new gaps for the GM OEM plug supplier. Sent them an email about it and they said they didn't change the TR55 and to use the stock gap. Think I posted about it here, I'll look for the thread.