No check engine light. No power

[Derik_C]

00 f250 7.3 sudden loss of power," limp mode" wont achieve speeds above 20mph. No lights on. Any suggestions?

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[Arisley]

7.3 has no "limp mode"


Check output voltage on alternator, check fuel pressure.


Fuel pressure is not monitored by PCM.

 

[Derik_C]

Thanks for input.... will post outcomes. Anything else to check for?

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[Magnum PD]

Air filter maybe but fuel probably

 

[Derik_C]

Thank you.... i will check it out. I'll let you know.

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[wildbill963258]

Also dont necessarily watch for CEL but watch for water in fuel light if it even just temporarily comes on after you start the truck then it's time to change the fuel filter

 

[Derik_C]

Also dont necessarily watch for CEL but watch for water in fuel light if it even just temporarily comes on after you start the truck then it's time to change the fuel filter

Knock on wood... i have never seen that light on before. I have had the truck for 15 years.

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[lincolnlocker]

Does it feel like a dead pedal?

Need to scan it with a good scanner and pull the codes to help us out. Unless you accidentally put gas in it then it will have a code.

live life full throttle

 

[Derik_C]

Nope not a dead pedal.... starts and idles fine, it will have plenty of power for 5-10 minutes of driving.... then fall on its face, clacking and chugging. Getting it scanned now....

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[Magnum PD]

Fuel tank pickup screen is my bet

 

[Derik_C]

Fuel tank pickup screen is my bet

Yep..... that was on my thought train. Thanks for the input.

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[Derik_C]

Ok.... so, no codes, and once it warms up, blows greyish smoke. And symptoms start.

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[wildbill963258]

Do a buzz test on the injectors.

 

[Derik_C]

Do a buzz test on the injectors.

Will do, thanks for all the input!

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[lincolnlocker]

Ok.... so, no codes, and once it warms up, blows greyish smoke. And symptoms start.

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What are you reading codes with?

live life full throttle

 

[Denver]

Check the oil level!

 

[Derik_C]

Check the oil level!

Been there done that! Got the t-shirt... same symptoms though....

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[dsberman94]

Fuel pressure gauge into test port on fuel bowl and go for a drive.

 

[lincolnlocker]

Been there done that! Got the t-shirt... same symptoms though....

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What are you using to check codes with?

live life full throttle

 

[Derik_C]

What are you using to check codes with?

live life full throttle

Elm327..... i get two codes

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