I was doing ground and voltage check on the plug that plugs to the back of vp and plugged back up, when I started it it had different sound! So I took it for a test drive with redline on soon as I gave throttle it started hammering like it was running on couple cyclinder, it died! So I tryed to start it wouldn't, so I unplugged the plug and plugged back n and it ran so I tryed to give it fuel when redline light came on did the same thing!
I checked codes and it ran p0253,p0232! 232 is fuel shutoff signal voltage too high, so I got some grease and a clip for plug that holds it snug to the pump because mine had been missed up from a fire before I owned the truck! I put grease on and clip on and I started and ran took it up the road and back, ran codes and it had a p1689 and the usual p0230 because I'm not using wires for lift pump! I cleared codes with scan tool but it still came back several times trying to clear it,so I got it cleared finally and drove it again now the 253 is back and also the 230!
I checked
map voltage and it's right at 1 volt idling and 1.6-1.7 wide open. I haven't check straight from ecm yet but that's low right for a 01?
Truck fills weak and for some reason bout 36-3800rpm's with redline on boost shots up like 10psi.
Is this ecm related u think?