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Whats wrong with my 2008 chevy silverado fuel pump comes on fuel rail full injectors won't open truck won't start replaced fuel presser sensor fuell pump relay 4.8 litre engine

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You need to check there is power to the injector rail . If not check wiring loom for breaks and make sure it's not protected by a fuse. If it is check the fuse and our relay.

Posted on Jun 13, 2019

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Do the injectors have power to them?

Posted on Jun 12, 2019

Testimonial: "thank you Marvin for responding what do you mean do the injectors have power the truck has spark the fuel rail has fuel cranks won't start"

  • connie Camacho
    connie Camacho Jun 13, 2019

    Thank you Marvin for responding to me if the injectors aren't opening wouldn't that mean no power to them fuel pump on fuel rail full fuel pressure sensoris good ?? please help

  • Marvin
    Marvin Jun 13, 2019

    The fuel injectors are electrical valves, check for power to them with the key on.

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Posted on Jan 02, 2017

Anonymous

  • 625 Answers

SOURCE: cold start valve problem

if you have an electric cold start valve make sure to unplug it and if keeps apling fuel with electrical conector unpluged that means the valve is not good, but if not then you have an electronic problem, possible a bad cold start sensor or cold start module or cicuit problem, and might be a time to take it to an electrical shop

Posted on Jun 17, 2008

Anonymous

  • 1 Answer

SOURCE: 2000 chevy blazer, truck cranks

Does your battery go dead?

Posted on Dec 18, 2008

Anonymous

  • 1 Answer

SOURCE: 2000 chevy silverado 1500 4.3 eng

Chevy Trucks, Blazers, S10 pickup and the like will vapor lock ecspecially the 2000 models. Do not tighten the gas cap past 1 click. There is a tube that runs from the top of the tank down and this gets hot and collapses or burns in half. We just bought a reinforced rubber tube cut it to lengh and use it instead of part and it's worked grat for 2 years so far.

Posted on Feb 01, 2009

miracore

  • 6 Answers

SOURCE: 1989 Isuzu Trooper Won't Start

Oil level!!!

Posted on Feb 16, 2009

Anonymous

  • 2 Answers

SOURCE: Fuel pump and electrical

its very likley that your fuse is blown. If you look it should be something like injectors a+b

Posted on Mar 06, 2009

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1 Answer

I have a 2007 Silverado replaced fuel pump engeon light on, have 3 codes ,co896,poo69e,po191


2007 Chevrolet Silverado - 2WD or 4X4
2007 Chevrolet Silverado Classic - 4WD or 2WD . What size engine ?
Engine Controls and Fuel - 4.3L
Engine Controls and Fuel - 4.8L, 5.3L, and 6.0L
Engine Controls and Fuel - 6.6L (LBZ and LLY)
Engine Controls and Fuel - 8.1L

6.6 L
DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
The fuel rail pressure (FRP) sensor has a 5-volt reference circuit, a signal circuit, and a low reference circuit. The engine control module (ECM) monitors the voltage on the FRP sensor circuits. When the fuel pressure is high, the signal voltage is high. When the fuel pressure is low, the signal voltage is low. The fuel pressure regulator has a solenoid supply voltage circuit and a solenoid control circuit. The ECM controls the fuel pressure regulator , which regulates high pressure fuel that goes to the fuel injector rails and the injectors.

Apr 20, 2018 | Cars & Trucks

1 Answer

Replaced 2 gas pedal sensors on 2008 Chevy silverado.engine light still comes on. Code still shows pedal senor. Po201.what esle could be wrong?


Possible causes
- Faulty fuel injector 1
- Fuel Injector 1 harness is open or shorted
- Fuel injector 1 circuit poor electrical connection

Feb 15, 2015 | Cars & Trucks

3 Answers

I have a 95 chevy silverado with a 350. i have fuel to the trottlebody but not the injecters. why?


It seems like the fuel line may be plumbed up to the wrong place. The throttle body only regulates airflow. Check that the fuel line is plumbed up to the fuel rail, which feeds the injectors. There should also be a return fuel line from the fuel rail back to the fuel tank.

Jun 18, 2014 | 1999 Chevrolet Silverado 1500

2 Answers

Change the fuel pump and still won't start on a 2002 chevy avalanche


Check for spark to the spark plugs, while cranking the engine. If no spark, you could have a bad ignition module, or a bad crankshaft position sensor. The crank sensor sends a signal to the computer, to start the fuel pump and signals the ignition module to start firing the spark plugs. It also drives the tachometer through the computer (PCM) Powertrain control module. The ignition module can be removed and taken to a parts store to have it tested. The crank position sensor is not as easy to test. Easier to just replace it. Good Luck. But wait, I have seen people replace the fuel pump, checked the fuel pump harness for power, and all was good. However, if the fuel pump does not have a GROUND, it will still not operate. Might want to check that. Have fun.

Apr 12, 2014 | Chevrolet Avalanche Cars & Trucks

1 Answer

Have a 91 chevy silverado after start up it shut down the injectors and stalls replaced fule pump, filter ,regulator


2 possible problems the easiest is an inline fuel filter on the frame rail below the drivers seat. Second the mapping sensor may be shot it monitors several fuel and ignition functions.

Aug 28, 2010 | 2005 Chevrolet Silverado

1 Answer

I ran out of gas in my 99 chevy tahoe. will not start after gas was pumped. changed fuel filter and additional ignition parts & sensors. More likely the fuel pump or fuel injectors?


If you add a few tablespoons of gas directly to the throttle body after removing the air filter, or use starting fluid (ether), then if the car starts and runs after cranking, then it is a bad fuel pump.

Check the fuel pressure of the fuel pump rail to verify if gas is coming through the system.

If not, it's definitely a fuel pump.

If it were an injector, then it would still try to start on some cylinders assuming it's getting spark.

The fact that the problem started after gas was pumped, points to a fuel pump, as well.

So, I would go for the fuel pump if the fuel pressure is 0 psi or near that, or if one discovers that there isn't any gas coming through the piping when cranking.

Also, check fuses for the fuel pump and injectors.

Aug 17, 2010 | 2008 Chevrolet Tahoe

3 Answers

I have a 1992 chevy lumina z34, its not getting fuel to the injectors or the injectors or opening. I have fuel pressure. up to where you check for pressure on the fuel rail. it just died when I was driving...


Have you checked that engine oil level is okay, if so check that oil pressure switch is good. The switch is usually bypassed to start the engine, but it won't run with no oil pressure indicated...hope this helps

Oct 07, 2009 | 1992 Chevrolet Lumina

1 Answer

2001 Chevy 2500HD 6.0L, Hard starting.


Check the fuel pressure, bad fuel pump or sock on the fuel pump and fuel filter check spark plugs and check distributor cap, a fuel pump is $273.00 or a bad injector $110.99 or BWD Fuel Vapor Pressure Sensor for $35.99 any of these parts could cause the problem, so without doing a fuel pressure test it is a guess, if the vapor switch is bad it could cause a long crank time if the fuel pump is bad it has a check valve in the fuel pump, if the check valve goes bad the pump can't maintain fuel pressure so on start up the fuel has to pump from the tank all the way up to the fuel rail, if the injectors is bad it could leak after engine shut down and cause you to lose fuel rail pressure. Also the fuel vapor sensor could be stuck open and could cause the problem, all need to be tested, you can rent the fuel pressure tester from AutoZone or advance auto or Shucks they return your money when you bring the tool back as long as you buy the parts to repair it from them. That would be the first thing I would check fuel pump pressure and if you replace the pump then change the fuel sock as well. That model was not meant to burn ethanol and can kill the fuel sock the fuel pump and filter.

Jul 04, 2009 | 2005 Chevrolet Silverado 1500HD

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