schamran

I think I have posted about this before, but I have an Isspro Pyro, and it is completely unpredictable! it jumps around, and is very inconsistent. I have grounded the brain box to the negative terminal of the battery, 2x checked my power source, and 2x checked all the connections between the box and the thermocouple. Do I have a bad gauge? It is bran new, and it has never worked right.

921stgen

Have you contacted Isspro?

bigredbrick

Mine does that, but not since new. When I first start-up often it will peg then drop and the needle will dance around before settling down to the temp. Hitting the loud pedal will change it when it's doing it's weird gyrations. Keep us posted if you contact Isspro.

sdubfid

I had similar problems and solved it by grounding directly to the battery which you have done. I would contact isspro

92smokin blacky

I have an isspro too and sometimes when i start my truck up, the needle will jump up to 1800 and then come back down to normal or sometimes it will jump up to 900 for a few seconds and then come back down to normal.

I woulda said it was a ground issue, but where you have already done that, i would check all your connections good again and then contact isspro.

schamran

...Calling Isspro... Will report back. Thanks.

schamran

Had to leave a message. I'll let you know if they ever call back.

SOOT4BRAINS

I talked with a guy down at isspro about another issue and they were very helpful. I actually wrote them an email and they called me about it. My pyro goes nuts with large voltage changes. When its warm outside and the grids don't come on its fine. If the grids come on it pegs and then dances around. If I watch my voltage gauge I can see when the grids come on and as soon as they turn off, the pyro goes back to normal. The grids continue to cycle on and off for the first mile or so but after that the pyro reads fine. Maybe try putting a volt meter on the power wire right before it enters the "brain box" and make sure its getting good consistent voltage. I know you checked your connections, its just a "make sure" idea. What did you tap into for power? Maybe try rigging power off the battery as well and see what it does. Possibly too much loss through whatever you tapped into for power and the voltage is low enough that its making it go nuts. Hope this helps.

Aaron

schamran

It does go nuts when the grid heater is running. It also does it when I am just driving after the truck has warmed up. Funny, I just pulled up this thread as a guy from isspro called me, and he told me to check my thermocouple for millivolts. As the temp. increases, so do millivolts. He also said that at room temp there should be less than 1 ohm.