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2015 Volkswagen Golf — long crank only after filling the fuel tank

TowScout224Community StarterOct 8, 20252015 Volkswagen Golf TDIAustin
2015 Volkswagen Golf TDI, about 51,000 miles. 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? I am in Austin.
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6 replies

ShiftHunter834Community StarterCommunity StarterOct 8, 2025permalink
Ask what changed right before it started. Swap the cheap/easy piece first on the 2015 Volkswagen Golf and see if the fault moves. That's the branch I'd chase this week. If it doesn't change the out-the-door or the repair estimate, it's noise. Make the next action something you can finish this week. Might be overthinking it, but I'd rather overthink than overspend.
CleanGeek210Community StarterCommunity StarterOct 8, 2025permalink
Intermittent stuff lies if you only catch it once. Capture voltage while the 2015 Volkswagen Golf is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. 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. No warning lights, which is why I'm documenting it.
ShiftHunter834Community StarterCommunity StarterOct 9, 2025permalink
This is usually cheaper to test than to guess. If a shop can't duplicate it on the 2015 Volkswagen Golf, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. Run the total, not the monthly, before you commit. I already checked the easy fluid levels.
HybridShopperCommunity StarterCommunity StarterOct 9, 2025permalink
Log the conditions before you spend. A pressure test beats staring at a dry driveway if the 2015 Volkswagen Golf is losing coolant with no puddle. That's the branch I'd chase this week. On “long crank only after filling the fuel,” that was the fork that mattered for me. If you share a photo of the worksheet, easier to sanity-check. No warning lights, which is why I'm documenting it.
CleanGeek210Community StarterCommunity StarterOct 9, 2025permalink
Start with the test that can prove you wrong. Write temp, speed, and in-gear vs coast when the 2015 Volkswagen Golf does it — then decide on parts. You'll know quickly if you're on the wrong tree. A shop burned me once by skipping that step. Worth doing even if the car feels fine right now. Checking again after work.
ShiftHunter834Community StarterCommunity StarterOct 10, 2025permalink
If it were in my driveway, two 2015 Volkswagen Golfs can feel identical and have different causes, so measure before you copy someone else's repair. Save the big job until that test fails. Run the total, not the monthly, before you commit. I'd rather be boring and correct. I'd rather look cautious in this thread than stuck later.
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