My 2019 Honda CR-V has 37k miles on it. I took it into the dealership for a fuel pump replacement (recall fix) and a month later am now having trouble with the car randomly not starting. 70-80% of the time it will starts right up, but the other times it won't. And sometimes, it feels like a less "powerful" start, if that makes any sense. I initially thought it was the battery, so took it to an AutoZone and their machine said the battery looks fine and to instead check for a faulty starter. The car starts just fine when I use jumper cables. Could this be related to the fuel pump -- and if so, should I go back to the dealership? Is there anything I can do on my own without needing to go to a mechanic? Thanks in advance for any advice.
I have no evidence for this, because you already checked the battery. My gut is telling me it is the battery, just by your description. It is about the age that batteries start going bad. (Before it seemed to be 5-7 years, but now it seems like 3-4 years).
My family members 2015 CRV had trouble starting. Had it jumped. Started fine. Took it in and found out it was the battery.
It could be the starter, but usually Honda starters don’t fail so early. Unless you do a lot of short trips, like a lot.
It could also be the fuel pump. But highly unlikely, unless they installed a faulty one.
The car starts just fine when I use jumper cables.
Then your battery is probably bad despite the AutoZone test results. If original it's about 4 years old so that would be no surprise.
The car starts just fine when I use jumper cables. Could this be related to the fuel pump
No. The fact that you were able to start it with a jumper cable rules out the fuel pump.
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If you absolutelto know if your battery is still good or not, you would need to test it with a Carbon Pile Tester which actually places a more realistic load on your battery than the standard Battery Testers. It the voltage drops so low from the heavy load placed on it that it goes below a certain value, then you have to replace your battery.
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That’s the Gold Standard, but many places unfortunately don’t use that and when they test the battery there is a false sense of security when their tool says battery is “good.”