So I finally had the chance to work on the truck the other day... I pulled off every single ground wire I could find and cleaned them up so everything has good contact, I even made a few jumpers all over the truck for extra piece of mind. I also completely rewired the lift pump with brand new 12gauge power/ground wires with a 30a switch and a 30a in-line fuse.
The lift pump hasn't given me a single hesitation since then and the engine is running great, no issues..... EXCEPT, now while driving (with a full tank of fuel) I noticed the fuel gauge diving down to E with the light coming on and then going back up to where it should be. I haven't been able to establish a pattern such as only doing it when I turn left or turn right or hit bumps, or on a hill.... it does it sporadically and even while the truck is sitting on level ground at a redlight. I haven't noticed any changes in fuel pressure at the rail while driving or at idle or on the gauge I put in the fuel line right after the lift pump and water separator, that reads a steady 10psi constantly.
Before I cleaned the grounds and rewired everything, ALL my gauges would go wacky as soon as I hit the lift pump switch.... now its just the fuel gauge. I'm thinking the sending unit is going bad. Does anybody have any thoughts on that??
The lift pump hasn't given me a single hesitation since then and the engine is running great, no issues..... EXCEPT, now while driving (with a full tank of fuel) I noticed the fuel gauge diving down to E with the light coming on and then going back up to where it should be. I haven't been able to establish a pattern such as only doing it when I turn left or turn right or hit bumps, or on a hill.... it does it sporadically and even while the truck is sitting on level ground at a redlight. I haven't noticed any changes in fuel pressure at the rail while driving or at idle or on the gauge I put in the fuel line right after the lift pump and water separator, that reads a steady 10psi constantly.
Before I cleaned the grounds and rewired everything, ALL my gauges would go wacky as soon as I hit the lift pump switch.... now its just the fuel gauge. I'm thinking the sending unit is going bad. Does anybody have any thoughts on that??