Struggles to start?

2016 ACURA RDX
75,000 MILES • 6 CYL • 2WD • AUTOMATIC
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PEGUESEM
  • MEMBER
  • 1 POST
When I start my vehicle listed above in the morning after it sits overnight it starts up perfectly fine with no hesitation. After I drive it for a little while and let it sit in a parking lot from anywhere between 2 to 4 hours, it doesn’t start up right away. It usually hesitates before starting but eventually starts up. if I drive it somewhere else after that, and then let it sit for anywhere less than two hours, it will start up right away. Need help in understanding why my car is slow to start only after sitting a few hours after driving and not when it’s sat for longer periods of time (overnight) or shorter periods of time (30 minutes).

I just reported the issue to my Acura dealer who replaced the battery and unfortunately that didn’t fix the problem at all.
Jun 22, 2023 at 5:47 PM
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STRAILER
  • ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
I assume the engine is cranking over okay but just not running. If so, I would look for a vacuum leak and service the throttle body. Also, running the codes might give us a clue on how to fix it as well.

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

and use this guide when the engine is cold only:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/throttle-actuator-service

also

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.


Jun 23, 2023 at 11:35 AM
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