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2020 Acura RDX — long crank only after filling the fuel tank

CanyonSellerCommunity StarterApr 27, 20262020 Acura RDX SH-AWDWashington DC
The car starts normally most of the time, but after filling the tank it occasionally cranks longer and runs rough for a few seconds. Could EVAP/purge behavior cause this, and what would you test?
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2020 Acura RDX Technology

$29,500

Baltimore, MD

15 replies

DieselCommuter129Community StarterCommunity StarterApr 27, 2026permalink
I'd keep this practical. Verify the cheap/easy branch on the 2020 Acura RDX before a big repair or a big spend. That's where I'd start. Learned this the expensive way on a previous car. I'll update if anything new shows up.
RotorDaily862Community StarterCommunity StarterApr 27, 2026permalink
Write down what you already tried. A second data point from another 2020 Acura RDX owner helps more than a generic diagnosis. Then you'll know the next fork. Had a similar mess a couple years ago and that's what finally sorted it. I'd sleep better after that step, even if it finds nothing. If this is nothing, great. I want that in data.
CanyonSellerCommunity StarterCommunity StarterApr 27, 2026permalink
I parked the 2020 Acura RDX and wrote down what I already tested so I'm not repeating myself. This is me being the wet blanket on purpose.
BrakeCommuterCommunity StarterCommunity StarterApr 28, 2026permalink
I hear you, though I'd still want a second check. On the 2020 Acura RDX in Washington DC, I'd fix the thing you'll notice every day before chasing spec-sheet extras. That's where I'd start. On “long crank only after filling the fuel,” that was the fork that mattered for me. Keep sale price, fees, and rate as three different conversations. Climate here is different, so treat that as a local data point. I'd rather look cautious in this thread than stuck later.
HybridShopperCommunity StarterCommunity StarterApr 27, 2026permalink
Don't overfit one forum story to your car. If it still isn't clear on the 2020 Acura RDX, a specialist hour can be cheaper than another round of parts. That's where I'd start. If you share a photo of the worksheet, easier to sanity-check. I'm in no rush to be a hero on it.
DieselCommuter129Community StarterCommunity StarterApr 27, 2026permalink
Write down what you already tried. A second data point from another 2020 Acura RDX owner helps more than a generic diagnosis. I'd do that before spending real money. A shop burned me once by skipping that step. Not trying to scare you — just skip the expensive first guess. Might be overthinking it, but I'd rather overthink than overspend.
BoostDriverCommunity StarterCommunity StarterApr 28, 2026permalink
Quick add on that: A second data point from another 2020 Acura RDX owner helps more than a generic diagnosis. That's where I'd start. I'd want that in writing, not as a promise. This is the version I'd tell a friend.
CanyonSellerCommunity StarterCommunity StarterApr 28, 2026permalink
Following up on long crank only after filling the fuel: still happening, but I have better notes now. I'm in no rush to be a hero on it.
BatteryWeekendCommunity StarterCommunity StarterApr 28, 2026permalink
I'd keep this practical. Verify the cheap/easy branch on the 2020 Acura RDX before a big repair or a big spend. Then you'll know the next fork. Just my two cents from doing this recently. This is me being the wet blanket on purpose.
BatteryWeekendCommunity StarterCommunity StarterApr 28, 2026permalink
Don't overfit one forum story to your car. If it still isn't clear on the 2020 Acura RDX, a specialist hour can be cheaper than another round of parts. Then you'll know the next fork. Just my two cents from doing this recently. Make the next action something you can finish this week. I'm keeping receipts and dates in one folder.
ProjectTraveler413Community StarterCommunity StarterApr 28, 2026permalink
Write down what you already tried. A second data point from another 2020 Acura RDX owner helps more than a generic diagnosis. Then you'll know the next fork. This is from a 2020 Acura RDX in Washington DC. I'd want a dollar figure or a measured spec, not 'should be fine.' Might be overthinking it, but I'd rather overthink than overspend.
TrackEnthusiastCommunity StarterCommunity StarterApr 28, 2026permalink
Write down what you already tried. A second data point from another 2020 Acura RDX owner helps more than a generic diagnosis. That's where I'd start. This is from a 2020 Acura RDX in Washington DC. A shop burned me once by skipping that step. If this is nothing, great. I want that in data.
TrackEnthusiastCommunity StarterCommunity StarterApr 28, 2026permalink
Agree — and I'd add this: On the 2020 Acura RDX in Washington DC, I'd fix the thing you'll notice every day before chasing spec-sheet extras. Then you'll know the next fork. On “long crank only after filling the fuel,” that was the fork that mattered for me. Learned this the expensive way on a previous car. Climate here is different, so treat that as a local data point. I'd rather look cautious in this thread than stuck later.
RustBeltDIYer959Community StarterCommunity StarterApr 28, 2026permalink
Owner notes beat generic advice here. On the 2020 Acura RDX in Washington DC, I'd fix the thing you'll notice every day before chasing spec-sheet extras. Then you'll know the next fork. On “long crank only after filling the fuel,” that was the fork that mattered for me. This is from a 2020 Acura RDX in Washington DC. A shop burned me once by skipping that step. That's my plan before I call anyone.
CanyonShopper955Community StarterCommunity StarterApr 28, 2026permalink
Don't overfit one forum story to your car. If it still isn't clear on the 2020 Acura RDX, a specialist hour can be cheaper than another round of parts. Then you'll know the next fork. If you share a photo of the worksheet, easier to sanity-check. I'm keeping receipts and dates in one folder.
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