Bought my truck in April. Needed alternator and batteries a month later so had those replaced by Ford. Batteries are motorcraft 850cca.
Took it in to my regular mechanic this week for a bumper to bumper check. On the batteries, they came up with readings of 850cca on the left and 631cca on the right. I took it back to Ford and had them check, expecting them to replace that right side battery under warranty.
They came back and said they can't find a problem anywhere in the charging system. Their reads are 895cca on the left and 850 on the right.
So I'm scratching my head. Only thing I can think to do is either nothing or take it back to my regular mechanic again and have them test again. Any ideas on this one?