Question about 1989 Cadillac Sedan DeVille

2 Answers

1996 Seadan Deville 4.9L fuel pump stopped.

No pressure on fuel rail valve.relays and fuse good.no sound from pump when key turned.Is there an access panel under the backseat,and how do I remove the seat bottom? (I hate to remove the tank)

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 135 Answers

Before changing or adding a fuel pump I would check for power getting to the pump connector. I believe this model has an inertia switch in the trunk which if for some reason got tripped it will break the power to the fuel pump not allowing it to come on (a safety device in case of an accident) also if you have an air ride leveling system which was common on these vehicles there is actually a fuel cut off switch inside the trunk area. You usually can access the plug-in to the fuel pump connector from the underside of the car without dropping the tank.

Posted on Jul 04, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 396 Answers

I would purchase and install an electric fuel pump or have one installed. Simple to install, attach to side of car, place in fuel ine and place black wire to battery, only problem, the pump starts pumping immediately when engine is turned on and in case of an accident, it will not shut off as long as the motor is running.

Posted on Jun 28, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

1999 chrysler 3.5 lhs fuel not going to injectors


Then your fuel pump is not working, or your fuel filter is blocked. You will probably have to check your fuel pump circuit if you have no fuel pressure in the fuel rail, where the injectors sit. There is a fuse for the pump, usually in the under hood fuse/relay block. That is probably also where the fuel pump relay is located. You should hear or feel this relay click when the ignition key is cycled from off to on. Also, when the key is turned to on, you should hear the fuel pump in the gas tank turn on for about 2 seconds. This will put the pressure in the gas in the fuel rail, for starting the engine. If you don't hear the pump turn on for that 2 second period, it is probably a bad fuel pump. But know the fuse is good first.

Sep 25, 2015 | Chrysler Cars & Trucks

1 Answer

Car is turning over but wont start seems like gas problem


Listen for the 2 second hum or buzz from the gas tank, when you turn the key to on, not start. The pump should run for about 2 seconds to put pressure in the lines and up to the fuel rail. If you don't hear it, first check the fuel pump fuse, usually in the under hood fuse/relay center. Or you could check for fuel pressure at the testing port-shrader valve- on the fuel rail. If you punch the center valve down with a small screwdriver, gas should try to spurt out. If no pressure, the pump is bad or the wiring to it needs to be investigated. Power flows from the battery to the fuse to the fuel pump relay and then to the gas tank. The relay is turned on by the pcm and allows the relay to pass power on to the pump.

Many parts stores rent or loan fuel pressure gauges to check your fuel pressure. The correct pressure is critical for the injectors to work right. If the car won't start, check fuel pressure and check for spark. Usually gas or spark is the problem.

Mar 11, 2015 | Cars & Trucks

1 Answer

I have a 2001 Mazda protege. Has new fuel pump and pressure regulator, I have cleaned fuel tank , lines, rail, and injectors. Relays and fuses are good. I took breather off and sprayed fuel into throttle...


sounds like an electrical problem .pump isnt coming on .turn on key listen for fuel pump to come on for 10 seconds then shut off on its own. If you dont hear the pump then its probley fuel relay . next check wires are plugged into fuel pump. lots of cleaning ?? is the fuel rail screen plugged ???? disconnect before rail if the pump comes on next. turn on key check for fuel pumping out line .

Nov 21, 2013 | Cars & Trucks

5 Answers

2002 GMC Sonoma 2.2l 4cyl. I have been having intermittent fuel pump problems. I replaced the fuel pump and now the truck will not start. There is spark and there is flow at the filter, but it is very...


With the ignition key turned on without trying to start the engine you should hear the fuel pump run for a few seconds. That is how its primed to start. Upon starting the oil pressure reaches normal operations & the prime switch will cut off by the signal from the computer. Thus the engine still needs fuel to run so the computer switches on the fuel pump relay to provide the fuel to the engine. The prime switch is intergrated with the oil pressure switch. If you do not hear the fuel pump upon having the key on replace the oil pressure sensor

Dec 28, 2010 | GMC Sonoma Cars & Trucks

1 Answer

My 2000 chevy S10 wont start I changed the battery and it ran fine for 2 days now it will turn over but won't start


Check Fuel Pressure. First turn key to on position (without starting) and listen for the fuel pump motor. If no motor sound, your fuel pump is not working. Check fuel pump fuse and relay. If fuel pump works, check for pressure at the fuel rail (schrader valve on fuel rail for pressure testing). If no pressure, or not enough, fuel filter might be clogged or fuel pressure regulator may not be working properly. IF fuel is not the problem, start checking electrical, such as ignition control and proper spark to plugs.

Aug 14, 2010 | 2000 Chevrolet S-10

1 Answer

99 Honda Civic - Stalls


replace the relay and fuel filter first

fuel pump location and access panel
under the back seat swab

dex-4l3mo04yvnp2xdvhjfffy5rf-2-0.jpg

index-4l3mo04yvnp2xdvhjfffy5rf-2-1.jpg

Apr 16, 2017 | 1999 Honda Civic

2 Answers

My 96 blazer wont start it just cranks but wont start?


A typical engine needs mostly just gas and spark to run (besides air of course)
Sounds like the engine is not getting one or the other.

Fuel goes from fuel pump, to filter, to fuel pressure regulator, to fuel rail, to injectors.
You can test for fuel pressure with key on, at the fuel rail. There will be a test port on the rail that you can put a rag on top and push in the valve to see if there is pressure. (or use pressure tester)
If there is no pressure, check that fuel pump relay is working. (you can use an ohmmeter on relay to see if there is resistance). You can also test power to relay and to the pump with a voltmeter to see if pump is getting power. Or turn key to ON position and listen to see if you hear the pump turn on.

If you have no spark to any cylcinders, the crank shaft position sensor may be faulty which is very common in GM vehicles.

You can use an ohmmeter to test the sensor itself.
You can also get a spark plug tester to see if there is spark to each cylinder.
You can also remove one spark plug, plug back into plug wire, lay on top of engine so spark plug diode is 1/4" away from metal surface. Have someone else turn engine over while you look for spark. Do this to each cylinder.

Nov 16, 2009 | 1996 Chevrolet Blazer

2 Answers

Car will not start battery is fine could this be security system


could be, or a fuel pump/relay fault, or timing.

If the immobiliser is stopping you there should be a flashing red led or key symbol displayed on the dash, and usually it would start and immediately cut out, so it could be the other items I mentioned also.

If its a post 1996 car, it will be obdii so it wont be timing, but the fuel pump / relay / fuse for the fuel pump should be checked, when you turn on the ignition listen for a bzzzzzzzzzzz -click.... indicating the lift pump has primed the fuel rail. If its an oldy with a carb / points and a condenser, the points could be shot or the condenser leaking as well as the previous suggestions, or the carb needle valve can be stuck inside the float chamber on the bottom.

Nov 15, 2009 | 1995 Cadillac DeVille

1 Answer

Fuel pump problems


you have a shut off button in the trunk find it turn it off and turn it back on

Apr 30, 2009 | Mercury Grand Marquis Cars & Trucks

Not finding what you are looking for?
Cars & Trucks Logo

449 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8140 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...