Early 99 shaking on cruise, 2200rpm and up.

[400kStroker]

Interesting little issue here. Started a week ago driving into a stiff wind on interstate. 75 mph, 22-2300 rpm. When to pick up to 80mph and reset cruise, and the truck started shaking like hell, like fuel was cutting or something. Take out of cruise and just run throttle with foot and all is well. Yesterday, pulling 9000 pounds or so, same deal. Weird thing is, times it does it, times it works fine. Obviously with the load, the shaking was very noticeable. Truck runs great and all.

Forgot to add, this will do this in either my eco. or daily tune.

[scagmanf350]

Did you have speed sensor replaced? They recalled it a while ago. Also how long ago did you change oil?

[400kStroker]

Oil's about half life. Never received speed sensor recalls. But did receieve them for the cps. I'll check that out.

[400kStroker]

Checked out my VIN with Ford. No open recalls. They didnt have one for the speed sensor. It was for the speed control. Where is the speed sensor and what does it do?

[400kStroker]

Bumpin this. Truck started to do it off cruise on the last trip. Got a scanner hooked up to it and showed coad for ICP sensor. I've read that the IPR can have a pretty steady fail rate from being dirty or having bad orings. I also found a readup on how to disassemble the IPR to clean and lube it. Is that worth doing, or is it best to just replace it?