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Old Dec 21, 2022 | 10:57 AM
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fuel pump driver module

08,f150,190,000 miles. If I can hear the fuel pump spin up when I turn the key, that means my FPDM is working correct?
 
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Old Dec 21, 2022 | 05:38 PM
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Get torque pro it will tell you your fuel rail pressure . We have no idea what your problem is or your codes showing . I realize this must be new to you and it takes awhile to adjust to posting . we all have to learn .
 
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Old Dec 22, 2022 | 09:51 AM
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thank you so much
 
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Old Dec 22, 2022 | 12:57 PM
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that means my FPDM is working correct?
At some level, yes. Whether it's fully functional or not, unable to determine.

Why do you suspect it might not be?

 
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Old Dec 22, 2022 | 02:07 PM
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I am troubleshooting a crank no start situation, thank you for your input..
 
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Old Dec 22, 2022 | 02:24 PM
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A "Crank but does not fire" symptom can be caused by number of things, usually related to either no fuel or no spark or no compression.

Try shooting some starter or brake cleaner fluid into the intake while cranking and see if it fires on that. If it does, you have a fuel delivery issue. If it does not fire on the fluid, you are likely missing your spark or compression.
 
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Old Dec 22, 2022 | 03:49 PM
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I will do that, thanks a bunch...
 
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Old Dec 23, 2022 | 10:49 AM
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Timing can be the problem , it can jump . If that happens you will not get the fuel and spark at the right time. A failed crank sensor can also do it . If it has jumped it means a timing job , quite a bit of work . Most of us have done a timing job ourselves so help is here .
 
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Old Dec 25, 2022 | 03:34 PM
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thank you sir, I appreciate it very much...
 
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Old Dec 28, 2022 | 10:21 AM
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I tried the starting fluid yesterday, no start, could it be the PCM? the service engine light has not come on.. the truck was not used for a couple of weeks, so now its a crank no start situation.. thanks for your input
 
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Old Dec 28, 2022 | 10:39 AM
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could it be the PCM?
As noted previously, it could be a lot of things. You have to narrow it down logically before jumping to any premature conclusions.

1. A) Does the check engine light come on when the key is turned from OFF to RUN (not START)?
B) If yes, does it go out while cranking?
2. Does the odometer read mileage normally when the key is turned from OFF to RUN (not START)?
3. When cranking, does the tachometer, if equipped, register anything or does it stay flat-lined?


 
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Old Dec 28, 2022 | 11:33 AM
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the engine symbol comes on when i turn the key and stays on while cranking, OD reads normal, Tach does not move, but i noticed my oil pressure gauge went to halfway while i was cranking and when i turned the key off their was a rattling coming from the dash for a couple of seconds and the speedometer was twitching?
 
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Old Dec 28, 2022 | 03:19 PM
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Focus on the crank sensor and its wiring. Your symptoms indicate the PCM is not seeing a valid signal from it.

 
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Old Dec 29, 2022 | 04:24 PM
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will do sir, thank you so very much...
 
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Old Dec 30, 2022 | 04:28 PM
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the truck is now running, it was the crankshaft sensor, I must have watched 15 video's for a "crank no start" not a one mentioned that sensor, thank you so much for your input, you saved me a lot of money, I really appreciated your help!!!
 
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