It is stuck at 6 whether I turn the key on or off, it was working and then it blipped and stuck there. It is an ispro electric one, with the little sensor under the hood plugged into the fuel lines.

Anybody got any quick ideas, I checked all the connections and everything seems tight.

 

Bad sensor!

I had one of those electric units on my wifes 2k...it started acting up...so it was replaced with a mechanical one... Those electrical units are not always reading true...

Rick

 

That is what I was suspecting, oh well off to the warranty shop.

 

The sender, even with the key off? Possible I guess, depending on if the voltage that feeds the sensor is switched with the ignition or not. Those things are not reliable in diesel applications from what I have read on here, that is why I got a mechanical one.
My first mechanical issPro f/p gauge went bad about a month after I got it, would only return to 5 lbs when I shut the key off. Wouldn't move sometimes when I turned on the truck, then all of a sudden would start working, then would freeze. Replaced under warranty by the shop that did the install.

~Rob

 

Rob, cant remember - did you have a needle valve on your install??

 

Yep, had it throttled pretty far down, cracked just enough to get pressure.
Zero problems with the replacement.

~Rob

 

Definately a sender. I went through 3 VDO senders (supposed to be really good) before I finally got ticked off and went to straight mechanical. Been 2 years and I've never had a problem.