What spark plug should i be running in my 2001 F-150 4.6. I am currently running fresh Auto lite Double Platinums. My motor has been running like crap. I had it diagnosed and i replace my Delta Feed back sensor, Fuel filter, spark plugs and wires. It is not having the power it used to no get up and go at all. And on top of that 40-60 mph in overdrive with very low rpm my transmission will buck and shutter.

Any help please

Thanks Sean

 

Most have had bad luck with anything but the factory Motorcrafts. Try a search, there is plenty of good reading on that topic including installation tips.

Your welcome from one Sean to another.

 

I just called the ford dealer and they said the same thing to try motor crafts.

Thanks alot.

 

Get them from rock auto. 4.75 Vs 14.75 at ford.

 

Rocks the best!! I ordered plugs (Denso's) Monday and they were here Tuesday - NoSh^t!!!

You can't beat the price there. Don't be fooled by places offering free shipping, it's a scam.