When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I thought the 2007 5.4 dont have the plug problems. I heard they changed the plugs they were using. I have heard 2 stories. 1) that the 2007 are ok because they changed the plugs they were using. 2) All 5.4 3valve engines have the plug problem. Does anybody know?
As I understand it the only plug change is to a cooler heat range don't know if it will change anything as far as getting them out supposedly will be less carbon??
So Then the 07 5.4 will have plugs breaking when they reach 100k?
It can be done without breaking them by good tech's I would change them at about 50K it it were me actually it is me I am about to do my 04 unless I sell it next year for an 09??