GT99

I recently bought a used 99' GT, i need to change the spark plugs but don't know which to use...the previous owner did not include the manual, so... a little help plz <IMG src=smileys/smiley17.gif border="0">. Thanks

MineralGreyGT02

I like NGK plugs. For performance go with standard copper. For longevity under normal driving conditions go with platinum. If you need a owners manual for your Ford goto the ford.com website and sign on to the myford part of the site. MyFord will most likely have a PDF manual for your ride. The sales person at autozone, pep boys, etc... will be able to tell you which plugs fit your car. Also they can tell you the stock gap.</P>


I've readposts bypeople thatswear by Iridium plugs but they are too pricey in my book.</P>

InMyRearView

go to autozone or some auto parts.they'll hook you up with the right plugs. How many miles do you have on your car?

GT99

45,000 got it for 12k <IMG src=smileys/smiley4.gif border="0">

mdvaldosta

autolite platinums for me

InMyRearView

If you only have 45,000 miles you shouldnt need plugs yet! If those plugs are factory, they,re platinum. Unless your check engine light is on, Those plugs should be fine.In fact, ford doesnt change them till 100,000 miles

mdvaldosta

when you start modding , different fuel mixtures and engine temps can result, possibly reducing the life of plugs

InMyRearView

Thats could very well be true. Also the check engine light suppose to come on if plugs need changing.

vfast

never herd of that

InMyRearView

My brother made it to 75,000 on stock plugs in his 99GT and his check engine light came on. Took it in to Ford,they changed the plugs, problem solved. Newer cars sense mis fire or improper firing cylinders on cars. Improved diagnostics