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, F 350 EFI 1990 auto trans will start if i use starter…

Customer Question
F 350 EFI 1990...

F 350 EFI 1990 auto trans will start if i use starter fluid but dies shortly after fuel pressure at the rail is 38 to 40 on both tanks

Submitted: 2 years ago.Category: Ford
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Answered in 3 minutes by:
1/31/2016
Ford Mechanic: Ron, ASE Certified Technician replied 2 years ago
Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 38,839
Experience: 23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
Verified

Hello and thank you for your question,

If you are sure you have good fuel pressure , can you check and see if you have injector pulse. You can do this with a standard 12 volt test light by placing the test end on the red power wire at any one of the injector connectors and then place the ground end of the test light on the other wire with a paper clip in the connector and crank the engine over. If you have pulse the light should flash. If you do not then the light will glow steady. Let me know and we can work from there.

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Customer reply replied 2 years ago
will do!
Ford Mechanic: Ron, ASE Certified Technician replied 2 years ago

Okay let me know and we can work from there.

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Customer reply replied 2 years ago
how do i find you if i lose this page
Ford Mechanic: Ron, ASE Certified Technician replied 2 years ago

All you need to do is book mark this page. Im here for a while yet today and all day tomorrow.

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Customer reply replied 2 years ago
Ok checking now
Ford Mechanic: Ron, ASE Certified Technician replied 2 years ago

Okay

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Customer reply replied 2 years ago
Ok I have injector pulse and I have tac while cranking. It will only start when I use eather. And than dies.
Ford Mechanic: Ron, ASE Certified Technician replied 2 years ago

In order for the engine to start and run you need proper fuel pressure, 32 to 45 PSI, good spark to the spark plugs and injector pulse. If you are sure you have all three then the engine should start. Are you sure you have injector pulse?

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Customer reply replied 2 years ago
I'm sure. It will stay running as long as I am feeding it eather.
Ford Mechanic: Ron, ASE Certified Technician replied 2 years ago

Well if the injectors are actually pulsing and you have proper fuel pressure it should stay running. If you pull up the injector rail up and crank the engine over do you see fuel spraying out of the injectors? If you check this be careful to stay away from an ignition source.

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Customer reply replied 2 years ago
I will try. Can I do it with just one injector?
Ford Mechanic: Ron, ASE Certified Technician replied 2 years ago

In order to see if there spraying you are going to need to remove the 2 mounting bolts and raise the rail.

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Customer reply replied 2 years ago
It will be later I will give it a shot.
Ford Mechanic: Ron, ASE Certified Technician replied 2 years ago

Okay , just be care to not get close to an ignition source if. Unplug the coil to avoid a fire if they are spraying as the should be.

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