I figured it made sense to cut it off only partway, the main complaint people had was a “jumpy”over sensitive throttle at slow speeds, a small bit of a diffuser would make it much easer and safer to maneuver around parking lots & such, then on the road, throttle would past the diffuser, so, using a Dremel tool with a cutoff wheel & a fine grinding wheel. I cut it off about 2/3 of the way, leaving a diffuser of around 4 mm. & used the fine stone to carefully shape & smooth the edge.
I just installed it today, so my info. Isn’t complete at all yet. After I decided that the lok-tite had set long enough (about 45 min.), I took the truck for a short run, It started & idled like normal . As I went down my driveway I thought “it does nothing”, when I pulled onto the street & opened it up, I felt a little more pressure on my back & looked down at the speedo, I had gotten to 65 mph. Faster than before. I rode 5 more miles and pulled into a little park & stopped, it settled down to an even 600 rpm. idle. then I turned around and pulled out on the road heading home, from a 50 mph. Cruising speed, I punched it down about ¾ way to the floor, it still had a lag time before kickdown (but that may be my PCM tune-a different problem to deal with). Back home, idled fine. No CEL all was fine.
As far as other benefits & problems go , I’ll let you know soon, but right away it put some “ompph” into my little truck. For a little, fast mod. it was well worth trying. & I
thank HenryJ for selling me a throttle plate to cut, so I could keep my factory blade intact
, right back into the driveway and swapped back to the "diffuser free" blade.
