Engine help on a 1986 Ford Bronco 2?
i bought a 1986 bronco 2, its a fuel injected 2.9 liter V6....
it will fire when b-12 or ether is sprayed in it...its acting like its not getting fuel...it has 2 fuel pumps the guy who sold it to me hooked both up to a toggle switch...i know that the gas is getting to the fuel rails...im stumped and only have a limited knowledge...this truck has to be running by sunday...or im not going to have a way to work...anyhtin will help...
it crancked until the b 12 ran out...the fuel filter SHOULD be fine...but im not sure...it gets air, spark, just not fuel...i have 2 outta 3...im kinda getting overwhelmed....tell me what you would do if you where me
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Tags: acting, bronco, fuel filter, fuel injected 2, fuel pumps, liter, toggle switch
January 11th, 2010 at 2:23 pm
If you are getting fuel to the fuel rails under any kind of decent pressure at all, and it’s not firing even a little bit without starting fluid, then it seems pretty obvious that the injectors aren’t being activated. There are a few things that can cause this, but the most likely is that the Crankshaft Position Sensor is shot. Disconnect the connector at the sensor, connect a Voltmeter set to the 5 volt AC scale to the 2 sensor terminals, and crank the engine. You should see about one half volt AC current. If it’s much lower than that, the magnet in the sensor has worn out (magnets get weak with age), and the Engine Control Module doesn’t realize the engine is being cranked.
January 11th, 2010 at 2:23 pm
then its pretty apparent the fuel injectors are not spraying fuel. Will it atleast start without starting fluid? Or will it not fire at all? I would check all the fuses and relays. Check the wiring harness for the injectors. Possibly a broken wire or corroded ground. GL.
January 11th, 2010 at 2:23 pm
How’s the fuel filter? Has it been replaced recently? You said it fires when you spray starter fluid on it, but does it run? Or just turn over? Another possibility is the timing belt could be misaligned, or worse yet, broken. It’ll turn over, but wont start.
January 11th, 2010 at 2:23 pm
well it could be getting gas, but one of the pump may be weak, the one pump is in the tank, this one pick up the gas, the 3th one is the pressure pump. it may not be give the , pressure it need
January 11th, 2010 at 2:23 pm
follow crewchief look for a rectifier in the wiring looks like an amp.
January 11th, 2010 at 2:23 pm
i know this 4 a fact i had 1 the same year and all try putting a brain or ecm/ecu/pcm in it