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Help! Possible Battery Issue???
Ok, so I have a 2000 F350 SRW with the 7.3L (92k mi.) that starts and runs great when the temp. is above, say, 60F. I have two Interstate MT65 (675 CCA's) which are both not even a year old and have both been checked last week. Doing some research on forums and on Interstatebatteries.com recommends the battery with 850 CCA's.
When I went to the shop where the batteries were purchased they are saying that it is probably the starter and I wouldn't see any difference if I upgraded CCA rating to 850 or 1000. Why then will the starter turn over just fine if I get jumped off? I only get about 2-3 tries on starting and then after that the batteries begin to weaken. Seems to me the batteries are running down prematurely. There is no problem starting if block heater is plugged in and, yes, I have tested the glow plugs and all are ok Also, after the first start of the day, starting is not a problem even on cold days. I don't want to waste my money on bigger batteries if that's not the problem. Thanks in advance...