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Oct 6, 2022 | 10:24 AM

Dog8266

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1st Gear

Joined: Oct 2022

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Need help

F250 new ECM will crank no start no power to fuel pressure pump
please help me out

Oct 6, 2022 | 10:34 AM

Tpayne621

Cargo Master

Joined: Apr 2022

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Year? I'd check fuel pump relay first. 99-01 it's under radio beside turn signal flasher. 02+ it's built into fuse box inside cab and not replaceable.

Oct 6, 2022 | 11:30 AM

Walleye Hunter

Hotshot

Joined: Mar 2014

Posts: 10,750

Likes: 1,065

From: Douglassville, PA

Do you get WTS light when you first turn the key on?

Oct 6, 2022 | 11:54 AM

RacinJasonWV

Lead Driver

Joined: Jul 2017

Posts: 6,846

Likes: 2,326

From: WV

Fuel bowl heater fuse blown? Doesn’t it take out the fuel pump as well?

Oct 6, 2022 | 11:56 AM

Tpayne621

Cargo Master

Joined: Apr 2022

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I know it kills power to pcm which may very well kill the fuel pump.

Oct 6, 2022 | 01:49 PM

udsuth78

Lead Driver

Joined: Oct 2005

Posts: 6,129

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From: Ponca City, OK

Quote:

Originally Posted by Dog8266

F250 new ECM will crank no start no power to fuel pressure pump
please help me out

Where did the PCM come from? Are you sure it was flashed properly? Have you checked the inertia switch in the passenger foot well? Try checking for voltage to the PCM relay if voltage is good could try swapping relays to make sure that isn't the problem.

Edit: Were the ignition keys in the house where they belong during PCM work?

Oct 6, 2022 | 01:54 PM

pvdiag

Tuned

Joined: Apr 2004

Posts: 425

Likes: 72

From: Aroostook County, Maine

Quote:

Originally Posted by Tpayne621

02+ it's built into fuse box inside cab and not replaceable.

This is new information. So what happens if the relay fails?

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Oct 8, 2022 | 11:04 AM

Kwikkordead

Fleet Owner

Joined: Jun 2004

Posts: 25,090

Likes: 1,111

From: Rio Rico, AZ.

Quote:

Originally Posted by Tpayne621

How I've seen people do it is find the wires that go to it and hook them up to a standard relay. Quick google search should lend some info. Mine is a 99 so I've never dealt with it first hand.

This is what I would do. Why Ford thought it was a good idea to build a relay into the entire body of the fuse panel is beyond me.

Oct 8, 2022 | 02:23 PM

#10

bigb56

Logistics Pro

Joined: Aug 2009

Posts: 3,609

Likes: 324

From: Arizona

Hopefully the OP will come back with more details. One thing that should be checked is vref, if there are any shorted sensors it can take vref down on whatever harness the shorted sensor is part of for instance a shorted EBP sensor can take down vref on that harness and prevent the FP from energizing.
I think a lot of people blame the PCM when vref is down without first disconnecting sensors and checking for shorts.