Whats the best plug to run

[Tnbadboy]

Ive got a 93 choo choo truck is there a different plug other than stock that will help with performance

 

[oohunter04oo]

AC Delco rapid fires are the best plug for a TBI engine.

 

[ChrisAU]

I chased a rough idle problem for MONTHS on my 92 after I did a tune up using the best AC Delco plugs - two sets - before solving the problem with Bosch +4's. Now I won't use anything else. Put them in my 98 I sold a buddy just last night and they cleared up his hard start and bogging under throttle. I know they are gimmicky but hey they work.

 

[t93k2500]

CR43TS

 

[chevyman98]

I'm interested to in what everyone says. Any ngk recommendations

 

[SkyHighColorado]

CR43TS is junk in my application. They last about 20k then they are toasted. I now run autolite iridium enhanced plugs and they have been perfect. I run hypertech cap coil and taylor wires.

 

[98chevyz71]

E3 got my milage from 14-15 to 17

 

[twomanymontes]

Been running a set of Autolites with no problems, I run the E3s in my 01 SS and they work great, so I will be trying them next.

 

[magimerlin]

I run ngk's in everything... mid 94's is newest I buy so no need for anything other then good old standard plug and no gimmick plugs either.....