Question about 2006 Ford Ranger

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Fuel problem !986 Ford Ranger with 2.9 engine,Truck will not start,no electricity any where on the fuel system,replace module,mapp sensor,new fuel pumps,it has low and high pressure pumps,replaced fuel relay. Everything is firing like it should.You can hotwire the fuel system anywhere you want to and the pumps will work,but truck still will not start.Any ideals. PS Already changed computers.

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  • toth4646 Sep 16, 2008

    Thanks fastboyz,Ithink you hit the nail on the head.The other day small ground wire got caught in the alternator.going to ckeck all the grounds now,thank you!

  • Glen Weitzel
    Glen Weitzel Oct 11, 2008

    I have a 98 ford ranger 4.0 I have changed the fuel filter and the Fuel pump, truck wants to start but won't.

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On the negitive battery cable there is also a small black wire this is you fuel ground make sure this had a good connection the the negitive side of the battery.

Posted on Sep 16, 2008

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What are the top most common causes for the injectors on a 2001 ford ranger to not fire/mis-fire


1. Fuel (ethanol) clogging
2. Sensor (crankshaft or camshaft) mis-communication...bad sensor or signal to computer
3. Electrical harness (age cracking, corrosion)
4. Fuel filter clogged, not sending proper fuel pressure
5. Fuel pressure too low (fuel pump)

Not necessarily in order...but start with fuel, move to electrical inspection, then sensor...unless you have a CEL code to start with first.

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Well your engine is good if you get 135 on the compresstion even on all cylinders .
If I were you I would take an ounce or 2 of gas and put it down the air horn see if it runs then .It won't run for long but it will tell you if the electrical system is working .Once you kmow this then the problem must be fuel related or posibably a cloged catyalic convertor . When fixing these kinds of problems you need to start elimateing thing that could cause and be sure about the tests you do . Then build on what you find out

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1 Answer

2006 ford ranger 6 cyl. truck starts, runs, get to destination, try to start truck back up and won't start. wait for some time (appx 20 min) and the truck will start again. I picked up a new ba


Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

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1 Answer

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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.

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2 Answers

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I would check your fuel injector for fouling
When they foul the will develop a drip
Causing a fuel fluctuation that will have O2 sensors reporting rich and lean voltage changes
This causes the pcm to adjust injector pulses making them shorter and longer.
causing more fuel or less fuel.
From this condition you may see plug fouling.
Also check for leaking or faulty fuel pressure regulator or restricted return line.
Most of the time it wont be a bad O2 sensor the O2 sensor is just doing its job.
You also have already changed the plugs and Map so there already out of the way.
If this helps please give me some feed back
Hope this works for you FixYa

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1 Answer

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1 Answer

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1 Answer

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