Originally Posted by Doppelgänger
I can only think of two things.. airbubble in the system...or...I managed to put the t-stat in backwards. If it's air, it should burp it out in a few warm up/cool down cycles.
why not 3rd factor... that the re-route is working very effectively?
Perhaps TOO effective, as too cold can have an adverse effect on engine longevity.
After I installed mine, I logged many different types of runs on my MegaSquirt, and I had the same results as you.
On one cold morning (approx 15-18 degree celcius), cruising down the highway for about 10minutes, I saw my needle drop to less than 1/3 position.
But once the speed slowed and we started driving around suburban streets, it slowly rose back up to around 10'o-clock position, then settle to a little less than the usual 11'o-clock.
Nothing much to worry about in my opinion, but if runnig too cold is a concern, then do what I do and install a protective, but still free-flowing, grille during winter to impede air-flow a little.