How to install new GM wire harness on fuel pump module?

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Why does my Chevy Spark Plug not start?

Chevrolets have a common issue with fuel filters getting clogged. You always want to replace the fuel filter when replacing the fuel pump. This could cause the concern you are having. It may seem as you are getting enough fuel from the pressure regulator but if the pressure from the fuel tank is not correct, it will still not start.

Can a Chevy C / K 1500 run without fuel?

Also I haven’t fully checked the Spark, but the Truck run’s fine when you spray Starting fluid into the Throttle body. Any suggestions on why the truck isn’t accepting the fuel, it cranks fine, just wont run without starting fluid. these trucks have to have between 55-65psi of fuel to run.

What kind of fuel pump does a Chevy Silverado need?

It turned out the pump I put in was for a 96 C1500, which has a throttle body system and the pump only produced 20-30psi. The Fuel injection in the Silverado needs 55-65psi. Be very careful you didn’t put the wrong fuel pump in!!

Where is the fuel pump in the tank?

Newer vehicles are equipped with electric fuel pumps usually located in the tank. These pumps are connected to the electrical system by the fuel pump wiring harness. Over time, the wiring harness connectors may corrode or break, weakening the electrical connection.

How to review spectra premium fuel pump wiring harness?

Read reviews for Spectra Premium Fuel Pump Wiring Harness When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures. When autocomplete results are available use up and down arrows to review and enter to select.

Why does my fuel pump wiring harness stop working?

Over time, the wiring harness connectors may corrode or break, weakening the electrical connection. If your fuel pump stops working, or only works intermittently, the fuel pump wiring harness may be to blame. If the fuel pump wiring harness needs to be replaced, visit O’Reilly Auto Parts.

Where does the fuel pump go in a truck?

Searched forever for an answer. It turns out that in order to remove the bed of the truck, you must disconnect the ground for the fuel pump, which attaches in the rear on the drivers side. IIRC it ran either in or alongside the harness for the tail light wiring. Once I hooked that back up, my truck started right up.

What to do if your fuel pump wont start?

For future reference, I had this same problem when replacing the fuel pump on my 2002 s10 4.3L. Searched forever for an answer. It turns out that in order to remove the bed of the truck, you must disconnect the ground for the fuel pump, which attaches in the rear on the drivers side.

What happens when fuel pump harness stops working?

Over time, the connectors for your fuel pump harness may short out, resulting in electrical arcing or voltage drops. You may also notice burnt spots or melted plastic near the connector ends. If your harness no longer makes connection, it can cause your fuel pump to fail, leaving you stranded.

How to check O’Reilly fuel pump harness connector?

Read reviews for Standard Ignition 2 Terminal Multi-Purpose Connector When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures. When autocomplete results are available use up and down arrows to review and enter to select.

Where is the injector plug on a Vortec?

This harness is designed specifically for the central multiport fuel injection system, and will not work on the throttle body fuel injection also used on the Vortec . GM > L, L, L > Using a Wiring Diagram, I knew that I needed to locate pin #31 in the C2 (Red) connector of the PCM.

What kind of problems does a 1993 Jimmy have?

I have a 1993 Jimmy. It has been having starting issues. We have heard everything from the fuel injectors needs to be cleaned to replacing the water pump. We have replaced the computer twice, the second time the garage replaced it free. But now it does not start but turns over.

What kind of fuel injection does a Vortec engine use?

Jul 1, The system was used on L V6 Vortec engines through , and was redesigned in and renamed “Central Sequential Fuel Injection”.This harness is designed to be a complete wiring system for the central multiport fuel injection system on General Motors Vortec (L) injection engines.

How many connectors does a GM 4.3L PCM have?

The 1996-97 PCM (Powertrain Control Module = Fuel Injection Computer) on your 4.3L, 5.0L or 5.7L Engine has a total of 4 connectors. NOTE: For other PCM pin-out charts, take a look at the following:

What should fuel pressure be on GM 4.3L Vortec?

You can find this tutorial in Spanish here: Cómo Probar La Bomba de Combustible (GM 4.3L, 5.0L, 5.7L) (at: autotecnico-online.com ). The fuel system in your 4.3L, 5.0L, or 5.7L Vortec engine needs at least 50 PSI of fuel pressure to start.

What kind of fuel injection does a GM Vortec have?

I n 1992, General Motorsintroduced a very unique fuel injection system on its 4.3-liter Vortec V6 truck engine. Dubbed Central Port Injection, or CPI, the system looked and functioned much differently than previous designs. The CPI system utilizes one main injector that pressurizes six plastic tubes housed in the in- take manifold.

How to test a GMC ignition control module?

NOTE: Testing the ignition system is a breeze. This tutorial will help you test the ignition coil, ignition module, and the crankshaft position sensor: How To Test The GM Ignition Control Module (1995-2005).

What was the ignition module for a 1996 GMC k1500?

1996 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a misfire or a no-start problem (caused by the ignition coil, the ignition module, or the crankshaft position sensor). Wiring diagrams.

What kind of wiring does a Chevy Blazer have?

WIRING INFORMATION: 1989 Chevy S-10 Blazer WIRE WIRE COLOR WIRE LOCATION 12V CONSTANT RED Ignition Harness STARTER YELLOW OR PURPLE Ignition Harness IGNITION PINK Ignition Harness ACCESSORY ORANGE Ignition Harness POWER DOOR LOCK (5-wire reverse polarity) LT.

What’s the circuit diagram for a Chevy pick up?

This typical circuit diagram of the ignition coil, ignition control module, and pickup coil applies to: 1992, 1993, 1994, 1995 Chevrolet/GMC 1500, 2500, and 3500 Pick Up and Suburban equipped with a 4.3L V6, or a 5.0L v8, or a 5.8L V8 engine. 1992, 1993, 1994, 1995 Chevrolet Astro (GMC Safari). NOTE: Testing the ignition system is a breeze.

What happens when you turn off the fuel pump?

Just so everyone knows, a friend at a Chevy dealer told me that when you turn the ignition key to the ON position, the fuel pump only receives voltage for about 2 seconds. If it doesn’t start, then the voltage is shut down to the pump.

How does the fuel pump relay work on a car?

The fuel pump relay comes on for 2 second after you turn the key to on,then shuts off if you do not continue to start the car. If you continue to start the car the other relay, when the pressure gets to 4psi, energizes and turns the fuel pump on. This relay also activates the oil light on the dash.

When do you turn on the Ignition do you hear the fuel pump?

Also, you should be able to HEAR the fuel pump run for those two seconds when you first turn on the ignition. If you don’t, it is either the fuse (unlikely), the fuel pump relay (unlikely) or the pump itself. If you DO hear the pump for those two seconds, and it won’t start, then there is a good chance it is the fuel pump.

How many volts does the fuel pump have?

The truck will not start, I checked the voltage at the relay and fuse and it has 12 volts. I dropped the tank and unhooked the fuel pump and sending unit connectors and I only have 5 volts when the key is on.

Where is the fuel sending unit on a gas tank?

This is a small panel above the gas tank, and you will see the sending unit on top of the gas tank. Cut two equal lengths of wire. One should be long enough to reach the back of the fuel gauge, and the other to the nearest ground connection. Strip about a centimeter from the ends of both of these wires, and twist the strands together.

What is the wiring diagram for a fuel pump?

Automotive Diagnostic Spe… heat indicator wiring diagram from sending unit to guages. original engine was 305. Previous owner (s) switched to 350. guage does not … read more

How to fix ground wire from fuel pump connection?

Same with the power wire from the relay to the fuel pump connector.You can also try sliding the wire between two fingers while slightly bending the wire to feel for a soft spot but this may not work due to the fact that it works sometimes so the bad spot isn’t real big yet. 5 people found this helpful.

When did I change the fuel pump on my GMC Sierra?

I changed the fuel pump on my 1996 GMC Sierra earlier in the year. I cut through my truck bed right above the fuel pump so I would have easier access to it. For the most part my truck has been fine but I have had problems with the ground wire coming from the fuel pump. At first I thought it was just the old rusty bolt that grounds the fuel pump

What do I need for a fuel pump assembly?

I need the wiring diagram for a fuel pump assembly. The wire are different colors from the old unit that being replaced. I need the wiring diagram for a fuel pump assembly. The wire… I have a 2005 Chevy Avalanche.

How to disconnect car / truck fuel pump easy?

How to disconnect CAR/TRUCK fuel pump EASY!!!! – YouTube How to disconnect CAR/TRUCK fuel pump EASY!!!! If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

What should I do if my fuel pump is not working?

Fuel pump breakers usually have a button on top that pops up when it trips. Simply push this button back in until it clicks. Check the owner’s manual for the exact location. Fuel Pump Testing – If the fuse is good and the circuit breaker is not tripped; then the engine is not getting fuel pressure.

What should the PSI be on the fuel pump?

With the engine off and key on, there should be 45 to 60 PSI on the gauge. If there is nothing on the gauge, then check your connection to the shrader valve. You may need to remove the shrader part of the valve from the threaded tube. If there is still no pressure, then replace the fuel filter and retest.

What causes a fuel pump to die before filling up?

If you make a habit of running your tank all the way to empty before filling up; your fuel pump will most likely die before its designed lifespan. This is due to the fact that when you shut off the engine with a low fuel level; the fuel can drain from the priming chamber designed into the fuel delivery system.

How do you replace the harness on a fuel pump?

Start by disconnecting the battery first, and then disconnecting the wire harness from the fuel pump. Luckily for demonstration purposes, we have a harness that came off the vehicle.

Do you need to remove wire from fuel pump?

You’ll need to remove about a foot of the wire harness and the conduit from the old wire harness before you start cutting. Make sure you’re dealing with the one four wire connector for the fuel pump module, and not the fuel pump’s fuel pressure sensor connector.

Can You Heat shrink a fuel pump connector?

To heat shrink these connectors, you want to make sure you use a heat gun, not any open flame source. Also, be sure to keep it away from any fuel spills that may have occurred. Make sure you got that fire extinguisher on hand.

How do you replace a fuel pump in the garage?

1. Put on your safety glasses and have a fire extinguisher nearby. 2. Disconnect the negative battery cable. 3. Relieve fuel system pressure following the procedure found in the factory repair information. 4. Remove the rear seat or rear seat cushion as necessary. 5. Remove the in-floor access cover.

Do you need a wiring diagram for your GMC?

GMC Wiring Diagrams SEARCH GMC WIRING DIAGRAMS Wiring Diagrams› GMC If you run into an electrical problem with your GMC, you may want to take a moment and check a few things out for yourself. Before you dive in with a multi-meter, you will want to obtain a free wiring diagram for your specific model.

How big is a ps114 fuel pump harness?

2 Terminal Basic Normally Open PS114 2 Terminal 1/8″-27 NPT PS113 2 Terminal 1/4″-18 NPT 3 Terminal Normally Open, and Normally Closed PS122 3 Terminal 1/8″-27 NPT PS118 3 Terminal 1/4″-18 NPT 2 Terminal Harness Adapters(Harder to find)

What kind of wiring do you need for a fuel pump?

At the wiring you need to find the 12v supply wire from the ECU to the fuel pump. Once that wire has been found cut that wire so that you now have half of that wiring running to the fuel pump, and the other half running to the factory ECU. Choosing a Relay The relayyou need should be a four-prong relay with at least 14-gauge wiring.

How do you wire a fuel pump relay?

Wire pin 85 of the relay to the 12v supply wire from the stock ECU that you just cut. This 12v wire will now energize the relay to turn on. So now instead of the stock ecu energizing the fuel pump, it will energize this relay.

How does the wiring of the fuel pump affect the car?

The factory wiring of the fuel pump is tied in with many other parts of the cars electrical system. If there are any fluctuations in voltage in this system, the fuel pump will also be affected. Just think about when you have the radio turned up, or running the high beam lights, or maybe when the alternator starts to weaken.

What to do if your Chevy fuel pump fails?

Chevrolet fuel pump failures are a common and growing problem. If you have a fuel pump harness connector that looks like the flat one on the right or the square one at the bottom, then consider replacing it when replacing the pump. More details about this are below, but you might want to download your Chevy manual to help.

Why does my fuel pump not prime when I turn it on?

Pulled fuel pump relay and put in a jumper wire to run the fuel pump and it started. Put the fuel pump relay back in and it starts and drives, but the fuel pump still doesn’t prime when turning the key on. I’m afraid that after sitting overnight, it will once again refuse to start.

When did the Chevy fuel pump come out?

It started on Chevrolet truck models from 1996 to 2003 model years, but has expanded to other models as the connector and pump assemblies are not aging well. In fact, I have a financially strapped friend with an 04 Silverado that now caries a heavy rubber mallet in the truck.

How to install a mechanical fuel pump on Chevy?

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What’s the life of a Chevy fuel pump?

It’s happened to me more then once and I’ve read about it on auto repair forums. The original Chevy pump motor has a life expectancy of about 15-20 years. Running the vehicle out of fuel, which will actually run the pump in a dry state can shorten the expected life span.

How to install new GM wire harness on fuel pump module?