Excessive Nerve

I have a question not just limited to my truck (2000 f150 v6 4.2l) but cars in general.

Today I replaced my spark plugs since I pulled one off and noticed it wasn't in the greatest condition. I wasn't having any misfires or anything, but as soon as I drove with the new ones I felt an increase in performance and the throttle response was noticeably better.

Could someone please tell me how new spark plugs (they were the exact same brand) will have this effect even though the last ones weren't having misfires and I assumed they still worked?

If you're curious on what plugs I used they are the NGK G-Power Platinum Spark Plugs TR55-1GP's. (Same ones as the one that was on the truck)


thanks

white89gt

Did you use the Motorcraft Finewires?

Excessive Nerve

I was planning to but I went to my local ford dealership and they wanted $15.00 per plug since they had to order them from the USA. Online was going to cost me $30-$80 for shipping/import fees alone just to bring them into Canada so I decided to go with the NGK G-Power Platinum Spark Plugs TR55-1GP's (which I had on my truck previously).

Fordfan2006

http://www.tascaparts.com/ford/f-150...ame=spark-plug

Excessive Nerve

$45 cad to ship to Canada.

white89gt

15 dollars? Ouch.

They sell the Motorcrafts at Autozone.

Fordfan2006

they don't here where I live. Which is Indiana.

screamineagle

That makes no sense. Here in Ohio both AZ and Advance keeps them in stock.

Fordfan2006

huh. Just checked and they do. They didn't last year when I changed my plugs. I had to order them or get screwed by the horrible dealership in town.

Heavy_Metal

What about Amazon? Prime? iirc they were <$5 ea.