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Do you have spark and fuel pressure? Check the inertia switch? You might try a spray of starting fluid. If it tries to start you would know that the engine has spark, but the injectors could be working without fuel pressure and starting fluid would show you it is a fuel pressure problem if the engine fires with starting fluid.
Cranking is starter motor action so is turning over. If it cranks good but won't start, have a helper crank it while you check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure. Also check for fuel injector pulse. Any applicable trouble codes?
OK IF YOUR YOUR SURE YOU HAVE SPARK AND FUEL THEN THE PROBLEM IS AIR OR COMPRESSION I WOULD THINK COMPRESSION DO A QUICK COMPRESSION TEST AND I THINK YOU WILL FIND THE PROBLEM IS A BROKEN TIMING CHAIN ONE OTHER POSSIBILITY IS A PLUGGED CATALYST BUT FOR BOTH BANKS TO BE PLUGGED TO THE POINT IT WILL NOT START IS VERY RARE GOOD LUCK (WHEN YOU SAY YOU HAVE FUEL DO YOU MEAN THE FUEL PRESSURE IS GOOD AND YOU HAVE INJECTOR PULSE OR JUST THAT YOU HAVE GOOD PRESSURE THE INJECTORS MUST PULSE AND HAVE AROUND 45 TO 60 PSI (RULE OF THUMB) FOR IT TO START ) USE A NOID LIGHT TO TEST INJECTOR PULSE OR IF NOT AVILABE SUBSTIUTE A 194 BULB AND BEND THE WIRE TABS FROM THE BULB DOWN AND PLUG THEM INTO THE INJECTOR HARNESS (NOT RECOMMENDED FOR ASIAN OR EUROPEAN CARS ) THIS LIGHT WILL BLINK WHEN CRANKING OR RUNNING IF YOU HAVE INJECTOR PULSE
For a no start , cranks over ok. be sure you have fuel pressure at the fuel rail first, before checking the injectors. There should be more that 40 psi at the rail... if not .. you might have a fuel pump problem. Even if you have fuel pressure at the fuel rail... the next thing I would check for,,, is spark !! Make sure you have spark at the spark plugs. The order would be... fuel pressure first and then spark , , then injector pulse. !! Then plugged exhaust.... then bad fuel then engine timing. The injectors have power to them all the time. The PCM controls the ground to the injectors. So you would have to monitor the ground side of the injectors. So checking injectors is kinda complicated. Hope this helps you. Good luck.
Fords have inertia fuel cut off switch. You need to check that first. If you dont have fuel. If you have fuel and no spark you need to check for inj pulse to injector. Make sure no fuses are blown. If no spark and no injector pulse then replace cranksensor.
Im assuming this is a 3.9 ltr 6cyl? any way there is always three things to check in regards engine not starting.
1. Compression 2. Spark 3. Fuel. "make sure you have fuel in the tank" first :)
If your vehicle is EFI
If you cannot smell fuel. Carry out these simple checks. When the ignition is on engine off, Do you hear the fuel pump prime. This is noticeable by a short buzzing noise in the rear of the vehicle and then it will stop,
If noise is not present check the fuel pump fuse, then the relay, and last of all the fuel pump.
If the fuel pump is operational. Make sure the fuel filter is not blocked and obstructing delivery of fuel to the injector. If the fuel filter is ok, remove the injector plug from a injector and using a led circuit tester, or a noid lite. check for injector pulse.
If there is no injector pulse then it would possibly be a ignition module http://www.injectacarb.com.au/ford-falcon-eaed-ignition-module-p-40.html if this model of vehicle still uses a distributor
This only because I dont know if your vehicle is 3.2 ltr, 3.9 ltr single point inj, or 3.9 multi point inj,
ps: To check for injector pulse, using a LED TEST light just connect the test light in between the 2 terminals off the injector plug, and check for flickering of the led, this will say that the injector is pulsing.
A noid lite basically justs fits into the injector plug .
I hope this helps, let me know if you need more help. Regards.
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