Turns over but doesn't fire - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 1 Week Ago
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Turns over but doesn't fire

Hi, I went off roading last weekend and I went through some mud, and I went through it again and my truck just died. I got pulled out and let it rest, I was thinking I got something wet or something, little bit later I try starting it again and it acted like there was no gas in it. I checked the fuel pressure and it was very low to none. The next day I replace the fuel filter to fix the fuel pressure issue. It still doesn't want to start. I've checked the plugs, wires, fuses. Everything looks fine. Someone told me that it might be the crankshaft sensor, I'm really hesitant on that because the new part is kinda expensive for my situation right now and its alot of work to get it changed out.
Anyone have any ideas or ever deal with the crankshaft sensor?
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Dumb question maybe.... did you TEST fuel pressure after doing the filter ?
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I did before and after.
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Dang, so much for the fuel cut off switch/connectors getting mudded up
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First thing you do when you have a "crank but No Start" is to add fuel manually to the intake, called a 50/50 test
Put some gasoline in a spray bottle or get a can of Quick Start(ether), spray it into the engine, then try to start it
If engine starts and then dies, you have a fuel delivery problem
If engine doesn't start you have a spark problem
50/50, instant results

What year ranger and what engine?

And what Sparky was referring to is the inertia switch, it cuts power to the fuel pump in the event of a sudden stop, like an accident, but in off-road use it can "trip" on big bumps or "mud holes"
When you turn on the key you should be able to hear the fuel pump run for 2 seconds, and 2 seconds only.
Turn key off and on again as much as needed, to either confirm you hear the HUMMMMM of the fuel pump or to decide you don't hear it.
If you don't hear it then could be inertia switch has been tripped, it is located in passenger footwell area, with year of Ranger we can be more specific

Last edited by RonD; 1 Week Ago at 07:15 PM.
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