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Replace fuel pump starts then stops. I replace. 1999 f150.

Customer Question
Replace fuel pump starts...

Replace fuel pump starts then stops

Mechanic's Assistant: Have you ever replaced the fuel pump, or is this the original?

I replace

Mechanic's Assistant: What is the model/year of your Ford?

1999 f150

Mechanic's Assistant: Are you fixing your F150 yourself? What have you tried so far?

Yes

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Is this going to cost me

Submitted: 7 months ago.Category: Ford
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Answered in 2 minutes by:
10/6/2017
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 51,544
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Customer reply replied 7 months ago
My truck died on the highway had it towed home i replaced fuel pump it started up then died replaced fuel filter what next
Customer reply replied 7 months ago
It costs to much to call it to do it this way
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

What liter engine?

With a fuel pressure gauge connected to the injector rail, what pressure do you get when the key is turned to the run position?

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Customer reply replied 7 months ago
45 pounds
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

What liter engine?

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Customer reply replied 7 months ago
4.2
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

Thanks,

While cranking does it make any attempt to start?

Do you know how to check ignition spark and injector pulse?

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Customer reply replied 7 months ago
Its starts runs a few seconds then dieds and will start right back up and dieds
Customer reply replied 7 months ago
There is spark
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

Thanks, ***** ***** monitor the pressure through the start and stall and tell me the lowest reading you get and when exactly you get that low reading?

I assume you cannot keep it running with throttle applied?

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Customer reply replied 7 months ago
No will not runbut a few seconds even with tthrottle
Customer reply replied 7 months ago
The 45 was fuel pressure with key on
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

Okay so we have determined it is not the fuel pressure causing it to stall and it obviously is getting spark and pulse being it runs brief. Do you know if there are codes stored?

MAF sensor unplugged do you get the same results?

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Customer reply replied 7 months ago
No codes the same with MAF unplugged
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

Does it run poor prior to stalling or does it just shit off like the key s turned off?

Does it restart with ease like nothing is wrong?

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Customer reply replied 7 months ago
Starts up good and few seconds died
Customer reply replied 7 months ago
I hope you can help
Customer reply replied 7 months ago
Just before it died it it acted up then ran good
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

Using your scan tool can you monitor the CMP and CKP sensor readings to see if either is dropping out signal right before stalling?

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Customer reply replied 7 months ago
My scan tool does not have cmp or ckp
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

How about camshaft speed sensor and crankshaft speed sensor.

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Customer reply replied 7 months ago
Do not call will not pay 26 bucks
Customer reply replied 7 months ago
Cancel my dues you have done nothing to help me
Ford Mechanic: Chris (aka- Moose), Technician replied 7 months ago

Best of Luck, sorry you no longer can diagnose this.

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