At 49,whatever-thousand miles I pulled my spark plugs and put them back in. I did not want them to get stuck the heads. They were factory Motorcraft spark plugs. The truck then ran terribly nasty. The engine and transmission shook voilently. I made haste getting home but drove gently. On the way home I paid $65.00 for 8 Motorcraft spark plugs. That night I completely dismantled the ignition system. I cleaned it meticulously and put in the new spark plugs with anti-sieze.

Where did all this low end torque come from? My truck never really had that off idle torque. It always ran great from 2,000 to 5.000 rpm. Now it comes to life at 1,500 rpm. The mid-range did not change. At 5,200 rpm when the gas pedal is floored the tires generally break loose a little and always have.

Disclaimer: I had a professional cut into my Y-pipe and weld in my $50.00 junkyard 3" pipe and Magnaflow that I got off a Silverado. It is true 3" single exaust.