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Susan Maxwell Posted on Mar 20, 2012
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FUEL INJECTOR WILL NOT OPEN

PRESSURE WASHED UNDER HOOD... HASN'T STARTED SINCE..TOOK TO MACANIC HE SAID FUEL PUMP IS GOOD IT MUST BE THE COMPUTER ,ANOTHER ONE SAID IT IS THE DISTRIBUTOR ..CAN YOU PLEASE TELL ME WHAT'S WRONG WITH MY CAR

1 Answer

Reynaldo Andico

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  • Mercury Master 2,431 Answers
  • Posted on Mar 20, 2012
Reynaldo Andico
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This is a common occurrance on Ford and Mercury,Put the key on, you will have harness with a male to female connection wiggle and or twist till you hear a click from the relay area, when you do you found the problem start the vehicle

5 Related Answers

Anonymous

  • 426 Answers
  • Posted on Nov 20, 2008

SOURCE: 1990 montero no start. No power to open injectors, good fuel pump

The only other thing to try would be to use a continuity tester with noise and back trace to the computer or get computer wire color code to test injector pulse at the source.You may have a broken or poor wire that you cant see or a plug thats not in properly etc.

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Anonymous

  • 31 Answers
  • Posted on Feb 16, 2009

SOURCE: 85 s-10 2.5l no fuel from the injectors

electronic engine control unit calculates the mass of fuel to inject, not how wide it sprays. It's the type of solenoid that you use. Some have wider spray nzzles than others. An external Fuel pump helps the delivery of the fuel. Also since fuel injectors rely on mass air flows nowadays, you have to have proper mixture coming through. hows your Fuel pressure regulator?

The throttle position sensor reports to the computer the position of the throttle butterfly valve, which the ECM uses to calculate the load upon the engine-but inorder for this to run, you may need an external pump.

Sounds like nothing is being grounded back to the ECM to even give a reading. If your regulator is improper and you do not have a external pump (depending on your model), than check those. If not, Start from scratch.

If you ever lose your way, go back to the beginning_REWIRE!

Goodluck.

cy schousboe

  • 2002 Answers
  • Posted on Sep 22, 2009

SOURCE: 1987 S-10 CHEVY

Do you hear the fuel pump buzz for a few seconds when you turn on the key? If not you have an electrical problem. If you do, then trace the fuel line from the tank to the first point where it connects to something and loosen the connection. Turn the key on and see if you get fuel. If not then the problem is between there and the tank. If you do then try other end . Keep doing this at every junction and you should find the cause of your problem. Hope this helps.

saailer

David Burbee

  • 1871 Answers
  • Posted on Jan 23, 2010

SOURCE: fuel injectors wont open malibu 2004 clasic

Hello! Please tell me what you meant by "We took the wires to check for mass"?

However, you are correct, it is fuse #5 10amp. It is located in the under hood fuse block. Change the fuse; If it does not hold perform the following test...

With key off...Disconnect the Injector's plug in connectors...Each connector has two wires marked A and B...A goes to battery feed and B to the Power Train Control Module (PCM)...

Using an ohm meter set on the X10 scale measure from each plugs pin A to ground...It must be open, no needle deflection...If you read any resistance at all, the hot lead which is common to all injectors, is grounded in the harness...

Next measure from each injector (both pins) to ground...You should read zero ohms,,,No resistance to ground...If any one injector reads to ground it is defective...Replace...Since all injectors are tied to common battery, any one injector shorted to ground will short all of them to ground...

Send a comment ..............saailer

















I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Anonymous

  • 181 Answers
  • Posted on Apr 13, 2010

SOURCE: i change spark pluggs,plugg wires,distributor

Try changing the fuel filter and air filter.

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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.
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1990 olds 98 suddenly dies. starter spray into inj. cover starts it but then immediately dies again. fuel pump and cannister filter ok. new module filter off inj. line under hood. still won't start. w

You cant check fuel pressure that way. You have to connect a fuel pressure guage to the fuel rail at the schrader valve. It should have 30-40psi when ignition is turned on. Injectors not functioning properly will cause a misfire Sounds like a fuel pump or fuel going out.
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While driving my 2004 gmc truck IM can smell gas

If you have a hesitation when you try to drive after you first start your truck or you notice a strong gas smell under the hood it could be a leaky fuel pressure regulator which is one the drivers side on the fuel rail I had a pressure regulator leaking on my truck it took me a while to figure what it was because I only smelled a gas smell after starting and driving a few places and then after I opened my hood and followed my nose I found that was what it was it is a easy fix cost ya about $30 I was told to disconnect power on battery and turn your key on and listen for a sound from fuel pump to release pressure this helps on the gas really leaking out and pressure before removing old one...then just take yours out and remember how you took it out and make sure you put the O ring on the new one that comes with it and just put it in and clip it and put back on rubber line and that's it... if that's not the problem then it could be leaky injectors which is not a fun job...good luck hope this helps !!
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I replaced my fuel pump when my 1999 yukon wouldn't start one day. Now still won't start and I replaced the fuel filter. There is pressure but no gas getting to the engine. Don't know w

Guessing when you say pressure that you have fuel pressure and that the fuel pump is working but the injectors aren't pulsing and injecting fuel into the cylinders. The way your fuel system works is that you should have constant power at each injector and the vehicles computer (the ECM) gets readings from different sensors and send a quick ground pulse in order to complete the circuit. each time the ECM sends a ground pulse, that's when the injector injects fuel so the ground signal/pulse is quick (on and off, one and off..you get the idea). The first thing I would do if your fuel pump is pumping and you have fuel pressure is check the fuse. The fuse you want to check should be a 20 amp fuse in the fuse panel under the hood of the vehicle in the engine compartment. Below is a diagram of the fuse layout and I have marked the fuse you need to check (the ECM 1 fuse). If that fuse is blown you will not have that constant power at the injectors. If blown replace and that should solve the problem unless it blows again which would mean you have a short. If it isn't blown make sure you have power at all time when the key is on. The pink wire at each injector should be the power wire. If no power you need to locate the open wire for that circuit (coming from that fuse to each injector). This is where I would start. If you need further instructions as far as any more testing procedures, reply/comment here or feel free to email me directly at [email protected]. Hope it's as simple as a fuse for your sake and I hope this helped.


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Fuel pump won't run unless engine is cranking, but won't start

Are you sure it's running when cranking? It should have come on when key turned on.
This is for camrys up to year '91. It may apply in your '95, also. Check the 7.5 amp ignition fuse and the 15 amp EFI fuse and the EFI main relay, all located in the fuse box next to your battery. There is also the circuit opening relay tied in to fuel pump operation. It is usually found under center of dash. It is usually not the problem, but it is part of the checks for fuel pump operation.
If your car has a " check connector" or "service connector" (also called a fuel pump check connector) under hood on driver's side near the firewall (a little 1 inch cube with a cap on it), then bridge terminals +B and Fp with a jumper wire. Turn key to on (don't start car). The pump should come on. Listen for fuel return noise from the fuel pressure regulator, and verify pressure in hose from the fuel filter. If nothing, check those fuses above. Here is how power runs to pump: Battery to 40 amp main fusible link-to 15 amp EFI fuse-to EFI main relay-to circuit opening relay-to fuel pump-to ground. Ignition switch and the computer (ECU) work the relays to pass power to pump. Hope this helps some, Randy. Good luck.
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My 2003 Ford Escape is having problems starting - very intermittent - the engine will turn over, but not start when I turn the ignition. This happened initiallly about 6 months ago. I took it in for...

That is a false statement

You can put an Ampere Meter on it, when it is running

You can look at the motor running with an Oscilloscope

You can check Fuel Pressure & Fuel Volume

Your problem has nothing to do with cranking
Cranking is the starter turning over the motor

You have a no start condition, due to lack of fuel pressure

Now you see why I never recommend a dealer
Why would a professional tell you that stuff?

You have a complete fuel pump circuit with other items
that can be checked

You could install a new pump & hope that is the problem,
but if it took 6 months to come back I doubt it
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Replaced the Fuel Delevery System/Pump and the in-line fuel filter on my 93 GMC Vandura Van 2500. Van turnes over; however, no fuel in getting to the engine. I have checked the Fuel Pump...

install a fuel pump guage and check pressure at key on and start, it should hardly vary, it the pressure is constant check the injector signal with a noid light, while you are at it check spark(no spark no injector signal) you won't find a relay fuse
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First of all, that 'ticking' noise you mention, if it's what I think it is, it's normal (purge control solenoid valve) being modulated by the ECM to **** the vapors back out of the charcoal canister. The 'Hard Starting' condition you describe could be almost anything from fuel (fuel pressure, fuel pump, injectors), timing, air leaks, vacuum leaks, crank position sensor, etc.). You'll want to connect a fuel pressure gauge to the fuel feed hose/tube at the engine fuel rail (where the injectors are) and monitor the pressure when this hard start condition occurs so you can at least eliminate it as the cause. If you find the pressure is low or 'intermittent' or 'fluctuates' abnormally, you'll want to inspect the wiring/connections between the fuel pump fuse and the fuel pump connector - repair/replace as needed. If the wiring/ connections are good and you have power & ground at the fuel pump, then the problem is probably the fuel pump.


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