That's what I thought. thanks for verifying it. Okay, like I said before, my TSU apparently is telling the box 70 degrees or below. Wierd stuff. Today I get home, it was cooler last night and about 66 degrees now so coolant's gonna be about 66 degrees or less. What happens repeatedly when I turn it to run, Works as it should!!!!!!..... Guess I can live with this, just a little more cranking time when it's at 70 or above from a cold start. For some reason my TSU is set or malfunctioned to 70 degrees, or the box is...... I'll try disconnecting for a few minutes but that's what it's always done. Yesterday it was right around 70 degrees or so and it was all over the place, sometimes working sometimes just giving the flash..... Is there any chance my TSU was made to trip the glow plug system at 70 degrees rather than the 120 the TM shows?