Phoenix WS6

A while ago I started getting this rumble and shaking in the car at idle, like sitting at a stop light or drive through it would just randomly vibrate every few seconds enough to rumble the whole car. Recently it's intensified, I can get on the throttle and at certain throttle inputs the car will shake, almost like somebody is feathering the throttle ever so slightly up and down. If I put the right throttle input in I can get it to backfire, at least it sounds like a backfire, but quieter. Or I can just get on the throttle hard and power through it and it will go away. In any case, it's startin to worry me and I was wondering if anyone had any idea what it might be?

2001NBMZ28

Surprised it's not throwing any codes, not driving around with a permanent SES on are you?

Phoenix WS6

Took it to autozone today to diagnose it. Cylinder 8 misfire. guy said either spark plugs or spark plug wires. What do you guys recommend for plugs on an LS1?

TheLS1Kid

iTrader: (12)

NGK TR-6 or TR-55's.

supersickss

good luck changing that plug

taintedmeat

iTrader: (1)

It's not too bad if you get everything out of the way and don't have huge forearms. Never working out really paid off for me when I was able to change my plugs without any problems.

Phoenix WS6

Thanks guys, I've read alot about the TR-55's here and am probably going that route. Don't know much about the TR-6 though, anyone got info on it? What makes it different or better than the TR-55? Thanks

Starion

iTrader: (5)

Check this thread. Shows a good tool combo for changing #8.

https://ls1tech.com/forums/general-maintenance-repairs/727494-passenger-side-spark-plugs.html

ghardester

Don't know how long you've had the car or if you bought it from someone. Sometimes people, even shops, skip replacing that #8 plug because it's hard to do. Don't be intimidated by what is said about how hard it is. It's not that hard, just a little frustrating the first time. Read up on it and dive in.

fastflames

iTrader: (11)

the tr6 is a colder plug. its gapped at .035 and is better used for nitrous/blower applications. so definately go with the tr55's and if you change the wires go with the MSD's.