Have you put a volt meter on the battery when the fuel pressure is good and when it is bad? Also do the same at the pump.

Also does the pump feel hot when the fuel pressure drops?

 

i don't have a volt meter...i need one.

i ran jumper wires from my wife's tc to the battery on the truck and started the car so her alternator could charge the battery in the truck.

it ran a solid PSI for over an hour. at this point i feel like i'm having a voltage issue. but i don't have a meter lol.

without a meter, i know the alternator is pushing 14.x from the dash, but i also know that the pump loses psi once the engine compartment is hot. what i don't know is if that 14 volts is making it to the battery. the voltage isn't read from the battery on this truck.

 

Spend $9 at HF and get a volt meter.

 

cheap ***

 

Volt meter in the dash reads off what is coming in the main power feed to the ignition, which feeds the cluster.

How is your fuel pump wired up and how far from the battery is the power wire going to the fuel pump?

Is your battery under the hood still or in the bed of the truck or where?

Try this as a suggestion: Connect a 30 amp relay between the battery and the fuel pump. Ground the relay to the battery directly. then run your fuel pump power wire you are using right now to the activation side of the relay. Use 12 gauge wire for the battery to relay, and relay to pump wires. Then use 14 gauge for the ground and whatever your fuel pump feed wire is will be fine. 12 gauge wire can dependably carry 40 amps. and the wires to activate and ground the relay only have to carry 0.5 amps for the relay coil.

And you can get a volt meter at wal mart for 10-20$ depending if you want analog or digital.

Here is one on ebay for $16.49 shipped to your door

2" 52mm Digital LED Boost Water Oil Temperature Oil Pressure Tachometer Gauge | eBay

 

I already have it wired that way with a heavier gauge.

this little fella bolts right down to a factory battery tray with one of those wedge style blocks that chevy uses.

 

this thread almost makes me wanna change my setup and get a s10 roller lol

 

i always said that when i had my silverado. i finally have a s10. i like the s10 because it's a little sketchier to drive than the silverado. it's just more fun to drive. the driving experience is a little more involved than just hammering that big comfey silverado that just floated up to those speeds with 1 hand on the steering wheel and the other holding a cell phone. in the s10, i have both hands on the wheel.

 

What's the word on voltage issues?

 

TX, who makes that fuel cell kit?