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fuel injectors not pulsing . . . help!

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Old 05-29-2017, 02:45 AM   #1
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Default fuel injectors not pulsing . . . help!

Hi everybody,
I have a 1990 F150 with a straight 6 and efi.

It was running great until the other day when I got a crank no start.

It has good spark.

It will start immediately on starting fluid, but then die right away.

Ran a fuel pressure test and Fuel pressure is good -- new fuel pump, too.

Replaced the ECM and fuel pump relays

I think the fuel injectors all just stopped working. What can I check? This one seems to be a real head scratcher.

Thanks!

Joe
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