04BlackMagic

I have an 04 1500 Silverado 4x4 w/ 95,000 miles still on stock spark plugs. Theyre startin to show their age and I figured if i was going to buy new spark plugs id buy a good set. are the E3 spark plugs a good set to buy or is their a better set to run on these trucks? will these help alot with power, currently only performance mods im running is k&n cold air and edge evolution programmer, will these sparkplugs make a very noticeable difference?

thanks.

dlt76028

iTrader: (13)

No they won't help at all. Either buy you another set of OEM ac delco and forget about them for another 100k miles or get some NGK tr55.

zachm89

iTrader: (16)

theyre garbage...buy another factory set or some NGK iridium tr55's

and on a side note, ditch the edge 'programmer' for a real tune if you want some noticeable power gains...just my .02

outlawz2004

iTrader: (18)

If your looking for an increase in power, sell that edge and get yourself a custom tune. Better shifts, better power, better mpg. Stock AC delcos work great for the plugs.

04BlackMagic

thanks and yes i've been thinking about running a custom tune, just waitin on the right time.

budhayes3

iTrader: (19)

E3 spark plugs are great....for causing misfires. As mentioned, go for some factory replacement AC Delcos or NGK's, aside from those options, I'd run away

1Bear

iTrader: (1)

If your just needing a quality replacement plug for a basically stock set-up and don’t feel like springing for either the AC Delco or NGK in an Iridium, though I can’t imagine why, unless it’s for a cost savings and you just like to inspect your plugs a little more regular, I would recommend the NGK V-Power TR5 plugs over the TR55’s. The TR5’s come at a recommended .040” gap, instead of the .050” gap of the TR55’s. Of course if you do want to stay with an Iridium plug, the Iridium IX TR5IX is a good plug and also comes with a .040” gap, while the TR55IX is comes with an advertised .050” gap. I don’t know how much additional timing you’re running with your Edge programmer and I highly doubt in your case it’s enough to worry about, but in some cases when adding 10 degrees or more of timing it can become necessary to go to a colder range plug.