'04 spark plug question

[coild]

The plugs in my '04 are factory original and the truck has 34,000 miles. I have owned it since it had 20,000 miles and have never checked the plugs for tightness. I know the '03-'04 heads have the nine threads per inch. My question is; do you guys think I should check the plugs to see if they are still nice and tight, or just forget about it since I have never had any problems with popping a plug. Truck is bone stock execpt for a Magnaflow catback. She is my daily driver and is babied all the time, execpt when I feel 'the need for speed'.

 

[INFAMOU$]

Any FI vehicle should have the plugs checked/replaced regularly IMO.

 

[pedro1973]

dude u have a nice truck if havent any problems with it dont mess with it i have an 03 sonic blue and havent any problems with the plugs

 

[SID297]

It doesn't hurt to check, but it's not something I'd lose sleep over.

 

[MaLLo_SVT_150]

is there any specific brand on spark plugs our lightnings should use?

 

[coild]

If I were to change them, and since it is bone stock execpt for a catback, I would just go with the factory Autolites.

 

[MaLLo_SVT_150]

If I were to change them, and since it is bone stock execpt for a catback, I would just go with the factory Autolites.

cool beans..o'reillys i go! :banana:

 

[moon]

My old chart:

This plug chart has worked for many L owner's.

is there any specific brand on spark plugs our lightnings should use?

 

[Scuba-Matt]

The factory plugs are good for 75K miles, But it wouldn't hurt to put a fresh set in. Stick with the stock plug for your application. Set gap @ .044 Don't forget to put some antisize on the plug threads before installing them.
Use the stock Plug MotorCraft Platnum. Autozone sells the pretty cheap.

 

[SvtRacing]

If you are going to the trouble of checking the plugs wouldnt be a bad idea to change them. Use the NGK Tr-6 plugs. They cost about $3.00 a piece and you can get a set of new boots and springs for about $35 to $40. I took my truck to the dyno and descoverd it had bad plugs. I replaced the plugs after dyno. the plugs i took out were autolites and two of them were cracked on each side. My numbers would have been better with good plugs.