8 volts is pretty low during a load test. Do not rule out a faulty battery. I just received a faulty lithium from a reputable manufacturer. It would open circuit intermittently. New one has well over the rated 240cca. For what it is worth I ran the stock 150cca for two years before it got too weak to start cold. Try not to mask faulty components with a big ass (or two) batteries.
Does no one have a decent mechanic to diagnose these faults or are they stuck with blindly replacing parts in the hope it fixes the problem?
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Back on a gassy! 2018 EC300! 🤘
Txt 280 07 to make me feel like a gumby again
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