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Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Ford
Satisfied Customers: 15801
Experience:  30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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A mechanic installed two new batteries at the same time in

Customer Question

A mechanic installed two new batteries at the same time in my 2008 f-250 6.4 diesel, now it will not even turn over
Submitted: 1 year ago.
Category: Ford
Expert:  Tim Mohr replied 1 year ago.

Hi, my name is ***** ***** it ever start after he installed the batteries?

Customer: replied 1 year ago.
No, the mechanic jumped the starter and it started however when I turned it off it would not turn over
Expert:  Tim Mohr replied 1 year ago.

ok, are you at the truck right now or is it with the mechanic?

Customer: replied 1 year ago.
Then he hooked up his computer and did something that allowed the key to start it, but once again when I cut it off it would not turn over
Customer: replied 1 year ago.
I am with the truck, no mechanic here
Expert:  Tim Mohr replied 1 year ago.

Is there an antitheft light flashing on the dash, when you try to start it?

Customer: replied 1 year ago.
No, when I turn the key my radio resets
Expert:  Tim Mohr replied 1 year ago.

do all the dash lights come on, when the key is in the run position?

Customer: replied 1 year ago.
Customer: replied 1 year ago.
Everything looks normal until I turn the key
Expert:  Tim Mohr replied 1 year ago.

what does it do when you turn the key to start?

Customer: replied 1 year ago.
The dash lights stay on however my radio resets like it lost power but then cuts off when I release the key
Expert:  Tim Mohr replied 1 year ago.

this sounds like a ground problem, do you have a test light or a voltmeter?

Customer: replied 1 year ago.
Not with me but I could go get one
Expert:  Tim Mohr replied 1 year ago.

yes, even a cheap test light would help, but a volt meter would be better,Tim

Customer: replied 1 year ago.
Do you think it's at the battery terminals
Expert:  Tim Mohr replied 1 year ago.

Yes, it is likely, did he clean the termnlas before installing the new batteries?

Customer: replied 1 year ago.
I turned my headlights on for 5 minutes they are burning bright
Customer: replied 1 year ago.
I have done egg delete on this truck 2 years ago so I have a little monitor
Customer: replied 1 year ago.
EGR delete
Expert:  Tim Mohr replied 1 year ago.

are there any codes stored in the computer?

Customer: replied 1 year ago.
let me get them
Expert:  Tim Mohr replied 1 year ago.

let me know,Tim

Customer: replied 1 year ago.
Mil status is off
DTC CODE p1000
DTC CODE u0073
DTC CODE u0100
Expert:  Tim Mohr replied 1 year ago.

can you check the #40 fuse in the fuse bix under the hood and see if it is blown?

Customer: replied 1 year ago.
From what I can see it does not look blown having a hard time getting it out
Expert:  Tim Mohr replied 1 year ago.

we also need to see if it has power, can you get a volt meter?

Customer: replied 1 year ago.
Do I need to take the fuse out
Expert:  Tim Mohr replied 1 year ago.

with a test light or a volter meter, you just check each side if the fuse for power, with it installed,Tim

Customer: replied 1 year ago.
11.82
Customer: replied 1 year ago.
I got the fuse out, looks good
Customer: replied 1 year ago.
Should I put the fuse back in?
Expert:  Tim Mohr replied 1 year ago.

yes, put the fuse back in, and touch the 2 metal tabs on top of the fuse and see if both sides have power,Tim

Customer: replied 1 year ago.
Can not get to it
Expert:  Tim Mohr replied 1 year ago.

was this running fine, before he replaced the batteries?

Customer: replied 1 year ago.
Expert:  Tim Mohr replied 1 year ago.

ok, I think what happened was he disconnected each battey, and the computer has lost its programming, does your tuner allow you to remove the egr delete programming and put it back to stock?

Customer: replied 1 year ago.
I think so
Expert:  Tim Mohr replied 1 year ago.

then if you can reinstall the stock programming and see if it starts,Tim

Customer: replied 1 year ago.
We are going to try and restore to the original settings and hope for the best
Expert:  Tim Mohr replied 1 year ago.

let me know how it goes,Tim

Expert:  Tim Mohr replied 1 year ago.

Hi, y name is ***** ***** both these codes, it is usually both knock sensors, but we lways replace the pig tails on the sensors when doing these, qs th wiring has problems too, are these the only codes?