So about a month or so ago i had my alternator replaced because my truck wouldnt start and had it checked and replaced well tonite it started rough dont know what to think what/where should i check first?



Thanks Ryan

 

Can you give us some more info? What kind of engine is it? How many miles? Was the battery tested or replaced when the alternator was replaced?

 

Ya sorry about that
F250 2001
5.4
18,000 miles
No battery was replaced 2 months before new alternator was replaced

 

That's an extremely low mileage truck. If it was a diesel with higher mileage I was thinking glow plugs with you being up north. Did it have problems starting(turning over but not firing, slow start like a dead battery,etc) or was it more of a rough idle after it started?

 

118,000 miles just having problems starting turn over when firing it up

 

Get a volt meter and look at the charging system basics. The during cranking, the voltage may drop to the 10 volt range, but if it goes lower that would not be good. Sometimes you need to do a few experiments to determine whether a battery is "bad" or whether you have something on that is running the battery down.


I guess you know this, but in terms of cranking, charging, and the battery, your truck is just like every car ever made by anybody. No special anything. You could ask these questions in a Camaro forum and the suggestions would be just fine. I just mention that in case you get a chance to compare it to some other experience.

 

either a bad battery or starter. check your battery voltage with the engine off and then when starting for starter draw and while the engine is running for alternator charging voltage