mustangman281

Take 10 minutes of your day and pull the plugs. They will tell you alot.

justinschmidt1

Those things arent easy to pull...lol

theres so much **** blocking access to them

That and Ive heard too many horror stories about them popping out or stripping the threads.

I dont have a torque wrench to torque them to 13 ft lb or whatever they need to be at so I dont know if I even want to touch them without a torque wrench

Stone629

I agree that it sounds like a fuel filter.

mustangman281

You have an 03 engine that has the extra threads. Pull them. I have never used a torque wrench while installing plugs and never once had a problem. 13ft lbs is just past hand tight.

I doubt you have anywhere near as much crap in the way of pulling your plugs as I do and it only takes 30min for me to change my plugs.

I am willing to bet that when you pull them you will have a couple that are destroyed.

justinschmidt1

Ok, thanks

Do you know what size I need for the plugs?

5/8 deep socket?

I changed the fuel filter, thats not it.

Im assuming its something in the ignition fuel system.

Could it be the coil packs?

mustangman281

You should be running TR6's gapped at .035. 5/8 spark plug socket and a swivel will do the trick.

justinschmidt1

I am running tr6's gapped at .30

They all look perfect...as they should, theyre only 3 weeks old.

What else could this be?

Failing fuel pump, stuck injector, bad coil packs?

bad gas maybe?

Repzard

If you have COP's I would check those too.
But if im correct your year doesnt have them.

How about the coil pack or spark plug wires.
really sound like a misfire or fuel problem to me.


Good Luck and hope you fix your stang

justinschmidt1

I dont know how to check coil packs or spark plug wires...but it does sound like a fuel problem or something

mustangman281

It sounds like a misfire to me. If the plugs are good then you need to look into the wires. If the packs go bad the computer will usually throw a code.