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Stuck on the side of the road! Have an 2004 F-250 4x4 6.0 that keeps shutting off.... just changed the alternator last week and now it runs like ****. Please help! Call if you want. (956)346-3278 only have 107k miles. Oh and i changed oil and replaced fuel filters too, two weeks ago. Right now it cranks fine, sounds fine for 20 seconds and then shuts off. Took me 8 cranks to move into a parking lot.
The "bump" means he was posting in order to shove your thread back to the top of the forum in order to keep it from being buried by other threads so you'd hopefully get help more quickly.
Pulled it to the shop and now the batteries are dead. Gauges are acting funny and it won't turn over. Hooked up the code reader and nothing. About to unhook the banks 6-gun tuner and see. Even my mechanic is scratching his head .. If it was an old animal it would need a bullet in the head. .....OK, now it turned on and ran for 20 seconds and then crapped out.
both batteries need to be at 12v. sounds like u had bad batteries situation earlier that killed ur alternator. my next move would be to check ur ficm voltage.
since u had such a bad case, it is possible tat ur ficm could have been killed in the process. still, check our tech folder and follow the testing procedure for ficm voltage. ur ficm should be located under the degas bottle.
u will see a heat-sink looking thing underneath tat. best of luck.
btw, if ur batteries died earlier, then the car's memory to store the codes probably got erased. if u hook on new batteries, it'll take a bit of driving before the codes come back again. i tink it has to be between 30 to 50 miles b4 the codes come back, and tats also if it's inherent.
Keep this thread in the back of your mind incase it happens again. Problems like chaffing, or shorts in the harness can cause these unpredictable and random shut-offs.