changing spark plugs

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Jul 12, 2003 | 11:08 AM

jvbimprez25rs

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changing spark plugs

i just bought a set of copper spark plugs for my 00 2.5RS, i have 40k miles on the car, first question, do i really need them? how do i know if i need to change them? when installing them, do i need to align them in a certain way or what to avoid misfires. thanks.

j

Jul 12, 2003 | 12:08 PM

Kevin M

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Joined: Nov 2002

Posts: 18,369

From: Reno, NV

Car Info: 1993/2000/2001 GF4 mostly red

Yes, copper is best, I recommend NGK personally, and yes you need to change them- every 30,000 miles is actually the recommended interval for coppers. You'll probably notice the difference in throttle response with the new ones. Oh, and don't forget to check the gap before you install them.

Jul 12, 2003 | 01:26 PM

Lavery

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Joined: Feb 2003

Posts: 258

From: Tennessee, US

Car Info: 98 Impreza RS

while we're one the subject of plugs, i was going to have a look at one of them last night just for the hell of it, because i am going to buy some new ones soon. And i couldn't get the thing out. They are so far in there that no socket wrench or whatever would work. Does anybody have suggestions on how to get these out, tools etc. Obviously i have changed them on other cars, but never on the suby.

thanks
luke

Jul 12, 2003 | 02:21 PM

Peaty

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Joined: Nov 2002

Posts: 1,644

From: Lawrence, Kansas

Car Info: 19' Impreza Sport Manual / 99 Miata / 13' OB

I changed mine right away on my RS, the OEM plugs are Champion, I really don't like that brand much myself. I used the copper NGK and changed them every spring.

Here is a how to guide:

http://www.scoobymods.com/forums/sho...=&threadid=166