How to trouble shoot fuel isseus - Cars & Trucks

Hey Ron,
AN internal combustion engine requires three (3) things to run...assuming the internals are good.
1. Adequate compression >120PSI
2. A properly timed spark
3. A proper fuel/air ratio

Start with one, and eliminate one at a time(make sure it works) - ..(this is the way a professional would trouble shoot an engine).

Instead of rigging it why don't you lean how to fix it right . There are plenty of trouble shooting videos on you tube for GM fuel pump circuits . Watch scanner danners video GM fuel pump circuit testing , Also check out a basic electrical trouble shooting video . Go to www.bbbind.com/ for a free wiring diagram of your fuel pump circuit .

what engine?

Do you have power to the injectors? if not check the ECM1 fuse. If blown check the wiring harness around the throttle body for pinched wires to the injectors. Really common on the early throttle body engines.

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

Pinched wire

it is probably your computer chip that is gone, had the same problem.

You should do fuel pressure testing , check for a good spark . Have a scan tool hooked up ,check for codes , look at engine sensor data parameters etc.... Look on youtube for diagnostic videos . engine dies etc... An check out basic electrical trouble shooting videos ,how to test fuel systems an ignition system testing . Find which system is causing trouble , then go to www.bbbind.com for free wiring diagrams . Then trouble shoot the problem .

To trouble shoot the fuel pressure you will need a fuel pressure tester, now if you dont have one start the vehicle (if it starts) open the gas cap and listen for the fuel pump it should humm and you will be able to here it. with thhe vehicle running you should be able to hear it and if it shuts off the car will stall, if it doesnt and the vehicle stall out you need to look elsewhere

First try shooting some starting fluid in intake manifold, and if fires up but still won't keep running, my guess next would be your looking and checking out your fuel pump. You can check that out my removing a line and see if fuel is pumping out of the out put of fuel pump. Because it it carburated its pretty easy to trouble shoot. It's going to be in most cases spark plugs , fuel pump.

P0705 Transaxle Range Sensor Circuit Malfunction (PRNDL Input).
The transmisison range switch is located on top of transmission, below the shaft where the shift cable is attached.

P0301 Misfire detected - Cyls. 1-4.
Faulty spark plug or wire

Faulty coil (pack)

Faulty oxygen sensor(s)

Faulty fuel injector

Burned exhaust valve

Faulty catalytic converters

Running out of fuel

Poor compression

Defective computer

This should at least narrow down the isseus.

Best of luck!

Fuel pump or injector assembly. Need to know what the fuel pressure is before throwing a part at it. By what you are saying I'm leaning tword the fuel pump. Make sure the wires at the top of the sending unit are not burn. There is a small 4 wire connector on the inside of the sending unit. If it's burnt you will need to replace both the pump and sending unit.