Bradbrowning

I checked the bolts on the oil pressure switch and it was 5 volts also.

So today I checked the aap sensor and it was at 5volts and also checked the map and temp switch on the thermostat housing and all was right and around 5 volts. When I revved it up the voltage would stay the same on the aap. Is that right? Also another note is I felt the fuel line that goes into the injection pump and it feels like it’s pulsing at idle. So I got under and was messing with the fass and I unplugged it while it was running and it stayed running with the pump off. Is that correct? So today I checked the aap sensor and it was at 5volts and also checked the map and temp switch on the thermostat housing and all was right and around 5 volts. When I revved it up the voltage would stay the same on the aap. Is that right? Also another note is I felt the fuel line that goes into the injection pump and it feels like it’s pulsing at idle. So I got under and was messing with the fass and I unplugged it while it was running and it stayed running with the pump off. Is that correct? Could the electronics of the injection pump cause this. Truck has no hesitation to crank at all. It cranks right up every time. No white smoke and no blow by.

Is there a spot to check for a the 5 volt wires to ground. And I’m going to do that with all the sensors. Thanks for the reply!

Okay I have a 01 2500 24v. Has 168,000 miles. Only thing done to the truck is a 60mm banks turbo and a banks intake. And has a fass fuel system. I bought the truck a month ago. I drove it over 3 hours home and did great. Soon as I got home it got dead pedal. I got the codes check and it throws codes ( p1693 0121 0113 1698 0522 0562 0237 0217 1488) it’s showing sensors has low voltage. I have a brand new aap sensor from advance auto. And a brand new alternator. And nothing changed. I calibrated like I was supposed to. So i figured it was the computer on the firewall. I bought one from fs1 and it came in today. I hooked it up and nothing changed. Still has dead pedal. (BUT BEFORE I DID ANY IF THIS IT HAD A BOOST FOOLER ON IT. I TOOK IT OFF AND PLUGGED THE ORIGINAL WIRES UP AND IT RAN GREAT FOR 20 min. CHECK ENGINE LIGHT WENT OFF AND EVERYTGING BUT IT CAME BACK. SO I JUST LEFT IT OFF.). I would greatly appreciate any help. I really need this truck fixed I hate catching a ride to work. Thanks! (Also truck doesn’t have 2nd gear. Don’t know if that matters or not. )