What brand of plugs are you running?

[Darkside 94]

AC Delco's

 

[RHamill]

I Just put Bosch Platinum +2s in a week ago, and it did make a noticeable difference.

 

[silverado_06]

Delco. actually i think pretty much every replacement part i have ever put on has been Delco.

 

["STROKER ACE"]

ac delcos all the way.

 

[GMCTRUCKS]

NGK's on my truck and I have the whole MSD set up and they lasted a long time or im a lazy butt and leave them on there forever. When I changed them out years ago example I had them when I put them in at 35 and when I took them off they were at 75 and my truck was still running fine.

 

[hiredgun8]

AC Delco...Had Bosch platinums and would get a misfire code once a week....Changed them and haven't had one since.

 

[Gamikatsu]

Just put another set of Delco Rapidfire plat's #12's in my 89 350 TBI Jimmy... Runs great! very smooth idle..

 

[SAATR]

Delco 41-963

 

[Hezsus]

Delcos, looking for something better. heard good and bad about e3's

 

[90C1500]

Just the regular AC Delcos in my GMC truck.