I have a 98 F150 ext. w/4.6l and in march I got a chip from motorhaven and ever since I have put it in the check engine light has been on. With the chip out the light stays off and because I have to unhook the battery I can't get a code . After 50 miles or so with the chip in light comes on.
Also I know its only a 4.6l but should it be a noticeable differance with the chip? Its not as far as I can tell and it was programed fo 93. I did clean the pins again this last time and still no change if the chip is not working would the truck start anyway? Thanks for your help

Tedd

 

Call Motorhaven on Monday.... 770-736-7122