NeedaV8foundation

iTrader: (4)

so the other day i was getting a misfire code and i thought it was because of a plug and it was... turns out the previous owner did not tighten down the last two plugs and the number 7 cylinder was litterally hand tight, and while i was doing that i figured i would replace all the plugs. i replaced them with AC delco Professional series and gapped them to specs (.060) and it just seems like my car is running different, not sure if its a loss of power or what, can changing the plugs make that much of a difference, which is the better plug? the previous ones were NKG V's

chavez885

iTrader: (12)

Yes plugs do make a big difference, GAP has a large effect as well.

NeedaV8foundation

iTrader: (4)

okkkk what should i do? change them back?

silverz28camaro

iTrader: (20)

I run ngk in everything i can. They are just a high quality plug for cheap.

silverz28camaro

iTrader: (20)

i use ngk tr55 gap at .055

samson_420

iTrader: (1)

I use Delco iridiums which is OEM.

Runs just fine. . . . . . . .

chavez885

iTrader: (12)

Those plugs should be fine especially for a bolt on car. Maybe double check the gap or lower it to 50 or 55?

silverz28camaro

iTrader: (20)

Also maybe a good set of wires as well. I bought msd wires $50. Granetelli also has a good set but they are about $150

NeedaV8foundation

iTrader: (4)

i have MSD, maybe im just smoking crack... the gaps were all perfect at .060 so maybe reduce the gap to .055?

silverz28camaro

iTrader: (20)

I think you may be on crack!!!!!!! Somedays my car feels slow as hell to. Simple solution.

Go find a mustang...I'll let you put two and two together.

If the weather changes dramatically, that could be it as well, my car seemed to be runnin great last night 30 degree weather, but today it felt slow in the 50 degree weather.

most likely there isn't anything wrong. Is the ses light still on? if not then don't worry about it, or get some headers if you don't already.

99 Black Bird T/A

iTrader: (4)

Same here. I've had best results with TR55's

I think 60 is too much. As a bolt on car mine picked up 4rwhp with TR55 @ 55 over the stock set up. Stock plugs were gapped inconsistantly. Dyno'd it.

NeedaV8foundation

iTrader: (4)

i re gapped them to .060 so i know they are all the same

NeedaV8foundation

iTrader: (4)

this is driving me crazy because i bought brand new plugs and i dont want to spend another $60 on new ones... anyone know what i should do?