Power to everything except fuel pump and engine

Hi,

Please check your alternator. If it's not working as usual, your car would stop as you're describing. It works with engine to give your car constant power. Problem shouldn't be starter as you wouldn't be able to start your car if that was the issue. Thank you.

GMC Sonoma Maintenance & Repair Questions - CarGurus

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can you bypass the fuel pump relay on a 1997 gmc sonoma

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CarGurusAug 7, 2014 - can you bypass the fuel pump relay on a 1997 gmc sonoma - I have no power at the pump. can i run a new positive lead from the fuse box straight to the pump... ... Question type: Maintenance & Repair ... 1991 gmc sonoma 2.8 l v6 changed everything in the fuel and ignition system except for the spark ...

GMC Sonoma Questions - wiring diagram for a 1995 gmc ...

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ground it

Have to start testing that system

No wiring diagrams your in trouble
Sort of like no road map,don't know
what is there to test or what happened

Given the age, you can be sure it is a rust
& corrosion wiring problem,IF infact there
is no battery voltage (power) to whatever
your doing.

Need a volt meter ,system knowledge (wiring
diagrams) & do voltage drop tests

You got power to most everything,what you don't
have is a complete circuit to operate the fuel pump

I would check to see if everything on the truck works,
except the fuel pump.

If your loosing other items, then check fuseable links

The top of the fuel tank may be the issue, as you have all sorts
of water,rust,etc & the wires for the pump,IF the pump is
any good

Year, make, model, and engine size?

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

have you check for power to the main fuel relay ,it is near the ECM. it also poers the ECM up. if no power is coming from it then the ECM will not ground the secondary fuel relay to transfer power back to the fuel pump.

SOUND LIKE FUEL PUMP RELAY FAULTY IT SENDS POWER TO ASD OR AUTO SHUT DOWN RELAY AND FUEL PUMP WHICH LOCATED IN THE POWER DISTRIBUTION CENTER UNDER THE HOOD IN THE ENGINE COMPARTMENT.

If one of the coils are bad the computer will send a code that can be read with a scan tool. Check this and also check your fuel pressure reading with a pressure gauge hooked up to make sure you have pressure from the fuel pump. Even if you hear it, it may not be putting out the correct pressure or fuel filter could be clogged, the sock on the fuel pump could be collapsed, or could just have an air lock in the fuel system. Maybe try pulling the air horn on your throttle body and pouring a VERY small amount of gas into it to force fire while you are cranking. Good luck and hope this helps.

You need to have the keys programmed to the new ECU. WIthout doing this, everything except the fuel pump will operate.

change the fuel pump and there might be one in the gas tank too.........