Question about 1994 Oldsmobile 88

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1994 oldsmobile 88 royal fuel injector

Where is the fuel pump and injector located in it in the engine or is it in the fuel tank cause i have to replace it but need to knpow where it is located?

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Buy a haynes automotive book for your year it will tell you where and how to fix it.

Posted on Aug 07, 2008

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2 Answers

Where is the fuel pump and fuel injector relays located on a 89chevyBlazer


Fuel pump is in the fuel tank and the fuel pump relay is under hood near firewall.The fuel injectors DO NOT have relays. The PCM controls the fuel injectors.

Feb 23, 2015 | Chevrolet Blazer Cars & Trucks

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My GMC Sierra ran out of gas and now I can't get it to stay running.


Fuel injectors require a high pressure fuel pump which is located in the gas tank. The gas serves as the lubricant for the pump, so wen you ran out and emptied the tank completely you no longer had lubricant and the pump burn out. It won't pump gas now because it's the fuel pump is burned out and needs replacing. It runs when you put fuel in the injectors as that bypasses the pump. Replace the pump and the never let the tank get below 1/8th full (half a 1/4 of a tank).Not lie the old low pressure fuel pumps on the side of the engine blocks. Not cheap to buy a fuel pump and have to drop the tank to replace the burned out one. $$$ in costs even it you do it yourself.

Oct 17, 2014 | 1994 Toyota Pickup

1 Answer

Constant whining noise from fuel pump


    1. Low Fuel

      Fuel pumps work by pressurizing the fuel and sending it to the engine. A low fuel level can cause the engine to work much harder to build the necessary pressure to pump the fuel. To analyze the problem, start the car when the fuel is low (below one-fourth tank) and listen for the sound. If the whine is audible, fill the tank immediately. When you start the vehicle again, the whine should be reduced or absent. If not, there may be another problem.
      Damaged Pump

      The whining noise may be caused by a damaged fuel pump. The fuel pump may be punctured or dented, reducing its efficiency. To resolve this issue, the fuel tank must be accessed and repaired or removed. The location of the fuel tank depends on the construction of the vehicle. In a vehicle equipped with a carburetor, the fuel pump is often located outside of the fuel tank. With a vehicle that has a fuel injector, the fuel pump is located inside of the tank. It is best to get a mechanic to address this problem.


      Impurities in Gas Tank and Engine

      • If the fuel pump is blocked by engine gunk, dirt, impurities in the gasoline or anything else, it will respond with a whine or some other very noticeable noise. Debris in the fuel tank can be sucked into the pump most easily when the tank is low. This debris gets caught in the pump and reduces the pressure. This problem must be fixed by removing the blockage which should be performed by a mechanic. Using fuel additives that clean the engine and keeping the fuel tank filled may also be a preventative measure.

    Jul 02, 2012 | 2004 Land Rover FreeLander

    2 Answers

    No fuel to injectors why


    Here are some troubleshooting ideas--let me know if you have more questions.
    In most modern cars, the fuel pump is inside the gas tank and is also usually sold with the fuel gage sending unit--an expensive and laborious R&R job. If the pump is working, you should hear it at least momentarily when the key is turned to the "on" position. If the pump is not working, the cause could be a fuse, a relay, an accident "kill" switch that needs resetting, or the pump itself. You'll want to rule out all of the inexpensive possibilities first. Use your owners manual (you can often find these online if you don't have the original) to locate the applicable fuse, relay, and/or cutoff switch. To check the relay and ignition switch, follow precedures at http://www.fixya.com/cars/r6022358-relay_check. You can also check for voltage at the pump connector with a test light.
    Assuming your pump works, fuel still needs to get to the engine. A clogged filter will certainly limit fuel flow, but will rarely prevent a car from starting. That said, filter replacement is an inexpensive bit of maintenance. Most likely cause of fuel not getting to the engine when the pump is working is the fuel injection system (not an issue for carbureted engines). Injection systems are beyond the scope of this tip, but there are a couple things you can check. Many anti-theft systems cut off the injectors when activated. If you have such a system, make sure your anti-theft system has not been activated. Also, the injectors require a certain level of fuel pressure. Though your pump may be working, it may not be producing pressure. If possible, have your fuel pressure checked or borrow the appropriate tool to test the pressure. Always check pressure at the fuel rail, as some designs include a separate regulator that is typically in the line in the engine compartment.

    Oct 03, 2010 | 1997 Dodge Intrepid

    1 Answer

    Car not starting, no fuel getting into engine


    Start with checking your fuel pump and injector mini relay. Fuel pump relay is #18 and injectors is #48 and is located in the fuse box under the engine hood.
    Also inspect your ECM fuse, the fuel pump get's it power from the ECM fuse and at wost. It's your fuel pump that has gone bad and that is located in the gas tank, but make sure your fuel filter is not to dirty causing fuel restriction and replacing that will address that issue.
    Thank you for using fixya and keep us posted.

    Aug 26, 2010 | 2002 Pontiac Grand Am

    1 Answer

    Rough idleing after pressure wash engine and fuel injector clean


    Hi,
    I'm assuming you added fuel injector cleaner to your fuel tank rather than using a direct pressure cleaner through your fuel injectors.
    When a solvent/cleaner product is added to your fuel tank, carbonaceous deposits (basically the dirt and gunk accumulated over years) are flushed through the fuel system. This can cause major problems if the contaminants manage to enter your fuel pump and make their way past the seals. This can and has damaged good fuel pumps. Downstream of the pump is the fuel filter - once deposits reach the fuel filter, they may block it and reduce fuel flow. The next major problem areas are the injectors themselves (rather sensitive to dirty fuel) and the engine.
    Fuel injector cleaner is not a product I would recommend using. Many major car manufacturer's have recently issued memos to repairers blacklisting the use of cleaner products due to the downstream damage that may potentially be caused by them.
    You should replace your fuel filter once you've finished using the tank of injector cleaner. This is most likely the problem (and could have probably used a replacement anyway). I hope this solves your problem. Otherwise you should check your fuel line pressure to ensure the pump is supplying what is required. Failing this, your injectors are probably the next most likely culprit. By this stage, things are starting to get expensive so lets hope the problem is just a blocked filter!
    On a related side note; pressure cleaning an engine can sometimes cause water and soap to push down beside the spark plugs in a spark ignition engine. Sometimes this will cause the engine to run a little rough until the heat of combustion burns the contaminants away.
    Hope this helps, Sherwin

    Jun 15, 2010 | 1996 Toyota Tacoma

    2 Answers

    No fuel getting to engine on 2007 2.4L Sebring


    HI. The most common issue here will be with the on-board fuel filter. This device may be clogged with debris, which in return, has caused the fuel flow to be shorten, or slowed. The filter ,in most cases, will be located near the tank, under the vehicle. It will be mounted just to the front left, or right side of the tank, in between the fuel lines. Although this is a common cause, there are potential issues that may cause this as well. Check the following:

    1. Fuel Pump- Check the pumps wiring for corroded contacts, and bad grounding. When you first turn your key to the start position, you should here the pump running for a short few seconds before the engine is started. This is an easy easy to confirm that the pump is working. Have an assistant turn on the key, while you are at the fuel cap(with the cap off). lean down towards the fuel fill area, and listen for the pump when your assistant turns the ignition to the on position(remember not to start the engine, just turn the key to the on position). If the pump dose not run for a short time, it may be damaged. replace if needed.Check the wiring and relay before replacing the pump.

    2. Injector pressure regulator- Check the regulator for worn contacts, or ruptured diaphragm.

    3. Injector(s)- Check each injector for worn harness connections, and correct pulse rates.


    Nov 29, 2009 | 2007 Chrysler Sebring Sedan

    1 Answer

    I removed the injector and fuel regulator assembly from the motor all in one piece, and left the electrical lines attatched in an attempt to see if the injectors were working. I attempted to start the van...


    Yes, if everything is still connected properly, except that the injectors are no longer seated int he valve head, then you should see little spurts of gas coming from them when the engine turns over.

    Be aware though, that it might not be your fuel injectors that are the problem. You need to finish checking the rest of the car before making that assumption.

    Once you know the injectors aren't firing, you need to check the fuel filter and the fuel pump to make sure the gas is getting from the tank to the injectors.

    You should have a fuel filter located on the passenger side of your car near the gas tank. Follow the gas lines under the car to find it. It is good to change it anyways, but you can check to see if gas is coming from the tank to the filter by removing the rear line

    ** BE CAREFUL, Gasoline is EXTREMELY irritating to the eyes and skin, and it WILL come out when you remove the line from the filter***

    If it is coming from the tank to the filter you don't have to check your pump. Then replace the rear gas line, and remove the front gas line going to the engine and make sure the filter spits out gas while the engine turns over as well.

    If there is no gas getting to the fuel filter, you will need to check your fuel pump, which should be located inside the gas tank. You can check it by getting under the car while you have a friend turn the key to the "on" position, but not starting the car. Do this 4 to 6 times to make sure you hear a little "Click, woosh" type sound that lets you know the pump is triggering.

    If you have gas coming from the tank, through the filter and it is still not coming through the injectors, then you will need to rebuild your fuel injectors.

    This is not hard to do, and consists mostly of changing the little gaskets in the injectors. But be aware that there are lots of small parts and the job cannot be rushed. Also be aware that lumina fuel injection systems are very sensitive. Make sure to disconnect your battery cables before removing the injectors from the system.

    Nov 10, 2009 | 1994 Chevrolet Lumina APV

    1 Answer

    1993 ford escort wagon,no electric to injectors


    The fuel delivery system uses an electric fuel pump to provide high-pressure fuel to the fuel injectors. The fuel pump is located at the rear of the vehicle, mounted in the fuel tank. It can be accessed by removing the rear seat.

    The fuel tubes leading from the fuel tank to the engine are under pressure during vehicle operation. When the engine is turned OFF, the fuel in the fuel tubes remains pressurized for long periods of time to provide quick start-ups. Fuel not used by the fuel injectors during operation is routed back to the fuel tank through the fuel return tube.

    The fuel handling components are protected by three fuel filters. A replaceable in-line fuel filter is located inside the engine compartment between the fuel tank and fuel injection supply manifold. A serviceable filter screen is located inside the fuel tank at the fuel pump inlet. A non-serviceable filter screen is incorporated into each fuel injector.


    I can get you trouble shooting tips if you want them.
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    Nov 18, 2008 | 1993 Ford Escort 4 Door

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