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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23001
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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Idling rough blowing black smoke and turns off after idling

Customer Question

idling rough blowing black smoke and turns off after idling for a couple minutes
JA: Is the rough idle intermittent or consistent?
Customer: consistent
JA: What is the model/year of your Ford?
Customer: 2002 f250 7.3l
JA: Are you fixing your F250 yourself? What have you tried so far?
Customer: yes and I've replaced the cps and the ebp sensor and tube and fuel filter
JA: Anything else you want the mechanic to know before I connect you?
Customer: it shakes really bad while idling
Submitted: 6 months ago.
Category: Ford
Expert:  Fordanswerman replied 6 months ago.

Hello. Are there any codes in memory?

Is it driveable?

How many miles on it?

Thanks

Customer: replied 6 months ago.
just exhaust back pressure code and no its not drivable and 244000
Expert:  Fordanswerman replied 6 months ago.

Ok. Have you by chance checked fuel pressure? If yes, what was the pressure?

Thanks

Customer: replied 6 months ago.
i have not checked fuel pressure
Expert:  Fordanswerman replied 6 months ago.

Thanks. How did the fuel filter look? Was it really dirty? Also was the filter bowl full of fuel when you pull it out?

Customer: replied 6 months ago.
it was pretty clean and yes it was full
Expert:  Fordanswerman replied 6 months ago.

Ok thanks. Do you have a fuel pressure gauge that hook into the fuel system handy?

Thanks

Customer: replied 6 months ago.
I'm sure i can get one
Expert:  Fordanswerman replied 6 months ago.

Ok, lets do something else for right now? By the way did this start all of a sudden or or gradually?

Thanks

Expert:  Fordanswerman replied 6 months ago.

are you still there?

Customer: replied 6 months ago.
Pretty much all of a sudden. I noticed a loss of power and little bit of smoke a couple of days before but then it turned off while I was driving it and it stated to shake really bad while I accelerated. But now it shakes when idling and idles rough and blows a lot of grey smoke
Expert:  Fordanswerman replied 6 months ago.

Ok, it sounds like a possible fuel delivery issue. When you turn the key to run, not start, can you hear the electric pump under the drivers seat are along the frame running for about 40 seconds?

Thanks