i have a 99 f150 xlt 5.4l 4x4 it is stuttering or something when u hold the brake and drop into gear if u hold the brake and give it some gas it gets worse starts shaking but if u just start it and let it idle u really can't fell anything just once u put it in gear but it all so doesn't do it all the time and it is not throwing any codes... i just replaced all the plugs the fuel fiter,air filter and put in some techron injector cleaner and drove it a couple of days and it's still doing it ......anyone have any advice or had this problem before please help

 

Did you change the COP boots? Check the coil center electrode for corrosion.

JMC

 

didn't replace the boots but i looked them all over when i chaged the plugs checked for corrosion and burn holes in the boots they looked good

 

no one had this problem before

 

No, never heard of it - does it drive okay when you treat it normally?

 

itdoes it alittle when driving like stoping and going

 

Completely off topic-

929, do you have any pics of your bike?

I love the old 929s and 954s

 

I would suspect the IAC , although this seams a strange way for that to act - it's suspect..

 

Still sounds like a low-grade misfire.

Steve