Contour Enthusiasts Group Archives Forums Modifications Duratec Maintenance Bucking....Could it be the Single Plats?

I'm having the same bucking problem with my 2000SVT. I just replaced the plugs with the MOTORCRAFT AGSF32FM.

A Ford dealer said these are the newest plugs for our contours and replace the double platinum ones.(4W2) Because the plugs have the suffix of FM I am assuming they are (finewire) yet no body can confirm this.

***If someone could verify this -I would be obliged***

I searched for this on the Motorcraft site and these plugs aren't shown specifically for our cars. After calling several dealers and Motorcraft, I found out that they all say the AGSF32FM plugs are correct.

Anyways, after replacing I did notice some hesitation going away. This could have been a seperate problem for me because the gaps were way off. Looks like the previous owner just threw the plugs in without checking. The bucking is still there!! My next step is replacing the plug wires.

In all likely hood you should try replacing the fuel filter.