1983 - 2012 Ranger & B-Series All Ford Ranger and Mazda B-Series models

No power to injectors

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Old 03-29-2017, 06:53 PM
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No power to injectors

I just was given this truck the fuel pump was wired directly to the battery I ran new wire to a new relay to fuel pump using a toggle switch to turn the pump on. Now I'm getting no power to the fuel injectors does the pump relay also send power to the injectors please help
 
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Old 03-29-2017, 07:43 PM
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the camshaft sensor,,which is on top of the camshaft scyronizer,,,sends signal to the computer then the computer fires the injectors,,,this is the same for almost all cars and trucks,,,ford,,chevy and whatever
 
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Old 03-29-2017, 07:45 PM
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not sure where camshaft sensor gets it power from,,,but here is a wiring link that might help,,,,,,,,,,,,Search Wiring Diagrams
 
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Old 03-29-2017, 10:48 PM
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would help to know what year and engine you have
 
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Old 03-30-2017, 12:54 AM
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Response

Originally Posted by spooktn
would help to know what year and engine you have
1986 2.3l fuel injected standard transmission 2 wheel drive
 
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Old 03-30-2017, 12:55 AM
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Originally Posted by spooktn
the camshaft sensor,,which is on top of the camshaft scyronizer,,,sends signal to the computer then the computer fires the injectors,,,this is the same for almost all cars and trucks,,,ford,,chevy and whatever

Where is this senser located and how do I test it
 
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Old 03-30-2017, 02:06 AM
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Thats a very good link that spooktn gave you for wiring diagrams.
The injectors are powered by 12 volts from the EEC relay on solid red wires. You should hear that relay click each time you turn the key on. It's behind the kick panel just in front of the passenger door opening.
The EEC relay also powers other things under the hood like the fuel pump relay, EGR valve & others
 
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Old 03-30-2017, 12:15 PM
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The ECM controls the fuel pump relay. The 86 had the FPR mounted under hood, passenger side, on the inner edge of the fender under the plastic cover. The computer relay was in the passenger side kick panel, mounted atop the computer.
The computer energizes the pump for a bit at initial key ON, then waits for SPOUT before re-energizing it. If SPOUT is missing, as in a crash or a flooded engine, the pump is left disabled. More or less.
Check to see if there are any stored codes in the EEC-IV system. Use a VOM or a tester and 'count the blinks'.
tom
 
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