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Pacar MX won't start after running out of fuel. System is primed.

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Posted on Jan 02, 2017

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SOURCE: 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.

Posted on Nov 11, 2011

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1 Answer

Got a 420 Honda 4x4 quad won,t start,but when I prime it,will start until I turn it off and on again,won,t start till I prime it again any suggestion


pull the carby off and have it rebuilt or re-kitted
the carby is not pulling fuel through for it to run but the primer , which is a small pump, is

Dec 17, 2016 | Honda Cars & Trucks

1 Answer

Car has been sitting up and will not start now. It seems to not be getting gas and I do not know how to prime a fuel injection system. Any help appreciated.


There is only a few cars fitted with an ancient petrol injection system that needed any priming.

Diesel engines mostly need the injection system priming but petrol injection systems do not.

Lots of cars use a system where the fuel pump runs for a couple of seconds when the ignition is switched on and that is all the time it takes to prime the fuel system. After a couple of seconds the fuel pump switches off and waits to restart when the engine is cranked.

As priming the system takes only a couple of seconds some manufacturers don't bother with the brief priming run of the pump and just have the pump start when cranking.

Could be faulty supply, fuse, pump relay or the pump itself.
If the car is fitted with an immobiliser, perhaps that is the problem.

May 07, 2016 | 1998 Mercury Mystique

1 Answer

Low fuel pressure. Won.t start but pump run.s then shuts off


Pump is only supposed to run a few seconds to prime system with key on. Should run in start position, but check for restricted fuel filter and for bad fuel pressure regulator.

Jul 14, 2015 | Cars & Trucks

1 Answer

Why will my 1998 chevrolet cheyenne not start unless primed after sitting overnight


by primed are you supplying a fuel source if so then the car is not getting fuel to burn. this indicates your fuel pump is bad and needs replacing and change the fuel filter also. the reason the pump won`t work sitting overnight is that the pump can`t build up enough pressure possibly because the fuel pressure is not being held, but after the first start up the system can maintain enough pressure to start through out the day. you can have the fuel pressure and volume checked with a gage when the problem occours to verify.

Aug 25, 2014 | Cars & Trucks

1 Answer

2006 monte carlo wont start without priming


sounds like your fuel pump weak, need to check fuel pressure when engine won;t start and check with engine running

Sep 03, 2012 | 2006 Chevrolet Monte Carlo

2 Answers

When starting the truck it turns over but won't start unless I turn it on and off several times


if the vehicle cranks and will not start, but when you cycle the keyon and off with a few second interval. by doing this you are priming the fuel line, if it starts after priming the system then i would look into the fuel system. would need to know exact details to give a more pin pointed answer

Aug 31, 2012 | 1999 Chevrolet Silverado 1500

1 Answer

1992 mx-3 v6 won't start. will hit sparaticly as if about to start but just won't catch. checked crank pos. sensor. need suggestions on how to proceed.


Check for a blue snapping spark on 2 or 3 plug wires(or all of them). If you get good spark, then ignition is likely not the problem. A weak or sporadic spark could be a bad coil or coil pack, or a bad ignition module (the ignitor).Check the coils with a volt-ohmmeter per the specs for your car. The ignitor can be tested at a parts store.
If spark is good, check fuel filter, fuel pressure, check timing marks on crank pulley and cam marks, Try a little starting fluid in the air intake and see if it runs for a moment. If so, then it's likely a fuel delivery problem. If no change, then it's likely an ignition circuit problem.
Good luck.

Dec 30, 2011 | 1992 Mazda MX-3

1 Answer

2001 chevy blazer won't start, no fuel, replaced the filter, won't start, when primed runs until out of gas, I hear the fuel pump working, but no fuel, could the pump be bad and not enough...


Hi Ralph,
First let me say that Jeremy W's answer is absolutely correct.

However, I would like to take a moment to applaud you for your question. Most people would not bother to ask what the correct fuel pressure should be. YES! it is absolutely possible that the fuel pump motor could be spinning and not pumping fuel. This is WHY the fuel pressure should be checked, because this is the only true test that will tell you if your fuel pump is working correctly.

Then I would also like to add that if you find that the fuel pressure is correct, then this only eliminates your FUEL DELIVERY system. It does NOT eliminate your FUEL INJECTION system. It sounds pretty obvious that if it runs when you add fuel to the intake that the problem is definitely fuel-related though.

So if you find the fuel pressure to be OK, let us know and we can help you diagnose the fuel injection system.

You are going about this the right way---isolate the SYSTEM at fault first. Only then can you run pinpoint tests to determine the actual cause of the problem.

Drive on!

Dave (dttech)

Oct 18, 2011 | 2001 Chevrolet Blazer

1 Answer

I have a 1998 GMC C6500 that i have started having to prime the fuel system every morning , and can't find where it might be bleeding down at.


Your problem is that you are losing fuel pressure when the vehicle sits for a period of time. You will need to replace your fuel pump that is in your fuel tank.The fuel pump assembly has a one way check valve in it and when that check ball starts to where or jams the fuel leaks back in to the fuel tank. Therefor if you prime the fuel system the truck will then start it is a common problem with these chevy in tank pumps and many people have tried to fight GM for a recall but they won't budge so your only alternative is to replace the fuel pump on your own exspence.

Hope this helps you.

Apr 29, 2011 | GMC C3500 Cars & Trucks

1 Answer

Silverado not starting unless prime


There is a check valve in the fuel pump that sounds like it may have gone bad. Check the fuel pressure at the shredder valve, there should be 60 to 65psi during the prime and will drop 5 psi when the engine is running. Once the fuel line is primed, check to see how fast you lose your prime. Since you replaced your injection system, we can eliminate the fuel pressure regulator leaking which was common on the injection system your truck run's on. If the fuel pressure drops fast then it's going to be a bad check valve at the fuel pump and it may be time to replace the fuel pump it self. Good luck and hope this helps. Note: do not try to start the engine with putting gas through the throttle body, it's been know for small fires to start and burn the spider injectors. 

Sep 04, 2009 | 1999 Chevrolet Silverado 1500

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