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Fuel injectors don't prime, starter cranks, doesn't fire

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If the injectors are not priming your fuel pump must not be working or your fuel filter is blocked check these 2 things and get back to me

Posted on Sep 06, 2009

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Posted on Jan 02, 2017

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My 1993 Dodge Dakota 3.9l v6 4x4 magnum wont fire it will crank over but no fire? The fuel pump relay, crank shaft sensor , spark plugs and wires were replaced. I don’t know a lot about this no fireing...


check the compresion in all cylinders 100 psi (compression good) check the spark -check the fuel pressure.30 psi at gauge with switch on.(if no keep pressure with switch off injectors or fuel pressure regulator are bad
check the signal to the injectors (get little injectors tester at autoparts) if no signal check the ground to the injectors black wire
or the other wire (computer)= good signal to injectors and good fuel pressure and good spark (defective injectors)

Oct 16, 2017 | Dodge Cars & Trucks

1 Answer

ISO definitive eng compartment pic/diag/schematic of fuel line & line-pressure valve/access, bleed disconnects + alt intake spots 4 starting fluid, beyond air filter intake.


to remove contaminated fuel , pull a fuel line of the fuel manifold and run the pump for a few seconds
not firing is sensor , immobilizer , ignition module problem but you stat that it fires on starter fluid so that cannot be right
starter fluid is a d good way of damaging the engine
a better way is to find and fix the fault
now to try and sort out what you are saying
it is cranking so the starter is good
it tries to run on starter fluid so there is spark to the plugs
it will not run and that indicates a lack of fuel to the injectors
a lack of fuel indicates
1--- a bad fuel pump
2--a vacuum in ht e fuel system from the tank not venting properly(EVAP system)
3--- fuel pressure regulator not working and providing pressure to the injectors
4--- bad injectors --- need cleaning
dump the starter fluid , buy a workshop manual and fix the problem properly

Oct 29, 2016 | Cars & Trucks

1 Answer

How to prime the injectors and fuel rail after replacing the injectors?


Electromagnetic or electronic fuel injectors are self-priming and all that is needed is to crank the engine, though I believe on later systems the injectors are coded and will not work unless the ECU has been informed the codes have changed. I think this applies more to diesels than petrol engines but on such matters I am not expert...

Staying with diesels for a moment - new injectors on either engine would usually mean fitting a new fuel filter. Sometimes this would require the primary diesel circuit to be bled in order for the high pressure pump to work.
The amount of starter cranking required can be cut by leaving each injector pipe loose in turn until diesel is dribbling from it.

Feb 20, 2016 | Cars & Trucks

1 Answer

Cranks, no start on 97 GMC van with 350 Vortec. Fired up with starter fluid


if it starts with starter fluid then its a fuel problem. check the fuel pressure and volume with a gage. these require at least 56lbs pressure to open the injectors and if the pressure is at 52lbs the they will not open. these use the pressure to open the poppet injectors and have a problem with the spider lines cracking and leaking fuel inside the intake. this is probably why it won`t start on its own.

Oct 12, 2014 | Cars & Trucks

1 Answer

12ht wont prime


filling the filters before installing will make priming go more quickly.
once the pump is primed crack open the fuse line at the injector while cranking until you have fuel pulsing out, close it then move on to the next injector.
keep doing this until the engine runs smoothly.
it may start running before all the injectors have been purged so keep clear of all moving parts and a fire extinguisher handy would be a good idea.

Apr 14, 2013 | 1989 Toyota Land Cruiser

1 Answer

I changed my fuel pump because it has 260,000 miles on it and truck would cut off when It got warm. Now it wont start after I replaced pump. What do I need to do to get it to start again?


Did you put at least 5 gallons in the tank so the pump will prime properly? Do you hear the new pump running for 1 second when the key is turned to run? Do this remove the Schrader valve core from the fuel supply rail to the injectors on the engine fuel pressure test port (don't loose it) and repeatedly cycle the key from off to run, do not crank the engine, this will help to prime the electric fuel pump, but have at least 5 gallons in the tank before starting the process. Make sure someone watches the fuel pressure test port so when fuel starts to flow you stop the priming process before everything is covered in gas. Also a fuel pump doesn't cause the system you described, an ignition control module and stator cause that and are a known problem in this year of truck. Another problem is the ignition starter switch comes apart.

May 04, 2012 | 1987 Ford Ranger

2 Answers

My car cranks but does not start. Is this a starter problem? Is there any way I can check to see if it is the starter that is bad?


If the engine turns over (spins) when you turn the key , your starter is working, if the car doesn't start (run) you will need to check for spark and fuel pressure.

Aug 22, 2011 | 2000 Chevrolet Impala

1 Answer

How do you prime diesel engine when run out of fuel 04 6.0


Ned. I don't know much about those 6.0's but in general the procedure is the same for bleeding. Make sure the filter is full before you start. There is an electric fuel shut-off switch on the injector pump that needs to be disabled next, usually by disconnecting the wire going to it. If it has a fuse so much the better, just pull it. Loosen the fuel line gong into the injector pump and crank the engine. Do it in short 20 second or so bursts or you will overheat the starter and have to replace it. once the fuel runs clear from the pump, no bubbles then you should be able to reconnect the shut-off wire. The engine should start and run rough for a minute or two but smoth out with-in that time. If it doesn't, you will have to loosen each individual line at each injector to bleed out the air. It should only take about 1/2 turn to get them loose enough. Do the injectors one at a time with the engine running. Hope this helps.

Jul 10, 2011 | 2004 Ford F250

1 Answer

04 f250 6l diesel cranks but will not start when cold.


it seems that because it sit's for a while that perhaps it's losing it's prime. if ythis happens generally you will have to reprime the fuel system. in a diesel system you also have glow plugs to help ignite the fuel. check to make sure your glow plugs work, but i would start with whether you have proper prime in the fuel system.. please rate this

Oct 09, 2008 | 2004 Ford F250

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