so i was runnin my 2.7 with 60lbs for a week on the stock spark plugs and now i put in the autolite one step colder at a .040 gap and the car runs crappier...can i put the stock plugs back in and just run those or is there a different gap i should try..any suggestions

 

gap the plugs smaller...gap them down progressively from .40. my car has the plugs gapped at .36 and it runs beautiful. also NGK's are the way to go for spark plugs

 

do i just tap the plug reduce the size of the gap

 

yeah, alot of times you can push on the bottom of the plus with your thumb and move it a slight bit

 

get ngk step 2 colder

 

i have no idea why u would use a walmart brand plug for a balt.... but good luck man, u get what u pay for.

 

what are you talking about..
autolite is a HUGE plug maker.. and are very good plugs..

plugs go by conductivity and since copper is > then plat/irodium in conductivity its a better plug.. his issue is gap related or cold range.. nothing is wrong with the plugs

 

i have autolite xp iridium plugs and they run great

 

yah i was goin to say autolites are better they just wont last as long

 

drop your gap to around a .035 and see how the car runs.. most of the guys on here are running plat/iridiums and they tend to have larger gaps from that

 

I know they are a huge plug maker.... i have had more fouled plugs from them than i can count.

I know copper is better performance-wise than platinums. However 30,000 coppers vs 100,000 platinums.

NGK makes coppers all the time. This is just my personal preference.