please help. 98 w/5.4 189thousand miles. out of the blue the truck has started to stutter and miss , it only happens while driving. it idels fine and no check engine light or codes thanks for any ideas

 

When? Light throttle, heavy throttle, cruise? Any recent mods? When was your last tune up?

 

Update your coils(it's time).. It's only $75 now for a set of 8. For almost 2 years people on this site have had good luck w/Kevins (link)and make sure you have Motorcraft plugs in their. You will most likely go another 100,000 before this happens again

Here yuh go - http://cgi.ebay.com/ebaymotors/NEW-I...mZ160211204789

If you need plugs , there usually cheaper locally. But, if you want to order Motorcrafts On line , the cheapest I seen was @ Rock Auto.

 

motor was rebuilt 15-20 k miles ago by a mercury mech. all motorcraft stuff used. also this happens at anything above idel. could I have gotten a bad c.o.p.within those miles? thanks

 

It's possible, do you have access to a scan tool or code reader? I know the light isn't on, but it could be stored in memory. You will have to find out which cylinder is misfiring.

 

small update: cleaned throttle body,still no help question, can autozone/advanced pick up a code without a check engine light? second how hard is it to do the c.o.p.s for a first time person, I have all the tools and mehanical exp. on chevy 350s and such. man I wish this was a 83 carb'ed chevy thanks ya'll

 

You can take it to them and see, they usually don't charge to pull codes. The coils are not hard, just one bolt and a connector, the main problem is working in the tight spots. When you reinstall don't forget to put di-electric grease inside the boots, where the plug goes in.