Glow Plug relay cycles...

[DZL JIM]

'97, with the built-in high idle of these tunes the GPR cycles on and off for the 2 minutes till it's done.
I have to switch to a stock tune w/o high idle to keep it from doing this.
New GPR and plugs.
On the '97 I used to drive, I did not have a chip and would hold the throttle with my foot at 1100 rpm or so to warm up and it used to do the same thing.

Any ideas?
Tuning doing this?
My '96 that I bought new NEVER has done this.

Thanks.