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Old 07-29-2018, 03:32 PM
flickasierra flickasierra is offline
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Cool flickasierra

my name is John and I have a 1993 Ford Ranger 4.0 its a nice truck but now it wont start . when you turn the key to start it starts right up but when you turn the key back to run it stops running. every time . starts and stop when you go to run. i put a new fuel pump and cam position sensor so far. please if some one knows what the problem is could you let me know Thanls

Last edited by flickasierra; 07-29-2018 at 03:35 PM.
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Old 07-29-2018, 03:44 PM
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Old 07-29-2018, 11:09 PM
Undrstm8ed Undrstm8ed is offline
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Default Re: flickasierra

Quote:
Originally Posted by flickasierra View Post
my name is John and I have a 1993 Ford Ranger 4.0 its a nice truck but now it wont start . when you turn the key to start it starts right up but when you turn the key back to run it stops running. every time . starts and stop when you go to run. i put a new fuel pump and cam position sensor so far. please if some one knows what the problem is could you let me know Thanls
Why does everyone go to a fuel pump without verifying things.

You'll need to pull the lower dash cover off, both the plastic one and the metal shroud underneath. You will need a 7mm and an 8mm socket and short extension or a nutdriver tool for each. Check the Ignition switch harness.

Constant 12V+ Yellow Ignition Switch Harness
Starter Red/Light Blue Ignition Switch Harness
Ignition Red/Light Green Ignition Switch Harness
Accessory Gray/Yellow Ignition Switch Harness

check the wires. You should have two Gray/Yellow When the vehicle is in the KO/EO position, all should show 12.4 volts on the DVOM or red light on a test light. The starter wire obviously should only show voltage (12v) while cranking.

report back
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Old 07-31-2018, 04:08 AM
flickasierra flickasierra is offline
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Default Re: flickasierra

what is the ko/eo position Thanks
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Old 07-31-2018, 03:53 PM
flickasierra flickasierra is offline
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Default Re: flickasierra

the reason we chain the fuel pump was later the pump stop working and the engine would not srart in start position of the key also we cccoulnt hear the pump running. bow the truck starts in the start position but shuts off when the key is turned to the run postion. we also jumped out the pump relay soas the pump stayed on all the time and the truck start but did the same thing when we turned the key to the run position , shuts off. It has to be something to do with the elctronics or electrical. a few years ago we put a new key switch and the truck was running fine.thanks for your help
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Old 08-01-2018, 12:23 PM
Undrstm8ed Undrstm8ed is offline
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Default Re: flickasierra

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what is the ko/eo position Thanks
Key On / Key Off

Quote:
Originally Posted by flickasierra View Post
the reason we chain the fuel pump was later the pump stop working and the engine would not srart in start position of the key also we cccoulnt hear the pump running. bow the truck starts in the start position but shuts off when the key is turned to the run postion. we also jumped out the pump relay soas the pump stayed on all the time and the truck start but did the same thing when we turned the key to the run position , shuts off. It has to be something to do with the elctronics or electrical. a few years ago we put a new key switch and the truck was running fine.thanks for your help
Id say if it was a big box store type over original Ford Part, it may have went bad. I'd start there as I explained above.
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