Dodgeman135

Installed a new air dog and vp44 and decided to put a fuel pressure guage in my truck is it normal for fuel pressure to drop going up a hill.

Ok guys I had to replace my vp44 so I also bought a new airdog 150 lift pump. So my question is. My lift pump wire that comes off the ecm when the key is in the on position it’s only reading 8.9 volts. Will this be enough voltage to trigger my relay for my new lift pump. Or is my ecm bad. Again the key is in the on position not cracking