High idle problems..TST???

[TSPowell]

If I manually put the truck in high idle mode, it will miss really bad about every minute or so. Its a real quick miss, almost like it misses and the rpms jump, then its fine for a minute and does it again. Never noticed the problem before the TST install. However, if the temps are low enough and the truck idles up itself, it never happens????? Whats the deal... it will throw the check engine light sometimes when this miss happens. Checked the codes: 0633 & 0336.

 

[JVolpe]

Did it start happening after it got cold out?

 

[Big P]

My truck does the same thing. Try running the high idle at 1500 rpm or 1000 rpm. Those are the only two spots that my truck will not miss.