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Slow to accelerate and hard to start

Tiny
AOKROGERK
  • MEMBER
  • 2013 HYUNDAI ELANTRA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 98,000 MILES
Driving along and the tachometer drops to 0. If I slow down or have to stop, it is very slow in picking up speed. If I turn the car off, it is very difficult to restart.
Wednesday, June 22nd, 2022 AT 7:25 AM

10 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

Is there ever a time that it won't restart? As far as the tachometer is concerned, that is an indicator there could be an issue with the crankshaft position sensor.

Do me a favor. Take a look through this link and let me know if you feel it mirrors what you experience:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Also, let me know if the check engine light is staying on when the engine is running. This could be related to a plugged catalytic converter, low fuel pressure, and so on. Additionally, let me know if the vehicle has been tuned up since it was new.

Take care and I'll watch for your reply.

Joe
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Wednesday, June 22nd, 2022 AT 5:03 PM
Tiny
AOKROGERK
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  • 5 POSTS
I have put 74,000 miles on the car and have never done a tune-up. It has stalled when idling at a light or in a parking lot. The check engine light does not go on. Repair shop put on the diagnostic machine but nothing new showed up. I take the car back to them on Monday to replace the shocks and brakes. I will have them check the Crankshaft sensor as well. I haven't tried to start it since I parked it on Monday evening to see if things work when cooled down. Will give that a try tonight. Would that also cause a car to be slow in accelerating up to speed? Further reading said possible low transmission fluid but haven't checked it yet.
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Thursday, June 23rd, 2022 AT 8:35 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

The idea that the tachometer drops to 0 while driving is what makes me think it could be related to a crankshaft position sensor. As far as the low power, it could be several things such as a plugged or partially catalytic converter, a fuel pressure issue, and so on. However, those wouldn't cause the tach to drop.

Certainly, check the transmission fluid. If it is low, it could allow the transmission to slip which would make it slower to accelerate.

Let me know.

Joe
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Thursday, June 23rd, 2022 AT 8:17 PM
Tiny
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  • MEMBER
  • 5 POSTS
The repair shop is still trying to find why this is happening.
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Wednesday, June 29th, 2022 AT 1:50 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

By any chance, have they informed you as to what has been checked so far?

Let me know.

Joe
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Wednesday, June 29th, 2022 AT 10:02 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi:
By any chance, have they informed you as to what has been checked so far?

Let me know.

Joe
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Wednesday, June 29th, 2022 AT 10:02 PM
Tiny
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  • MEMBER
  • 5 POSTS
Not yet. The tow driver left keys above visor instead of putting in drop box as requested so didn't realize my car was there until yesterday afternoon.
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Thursday, June 30th, 2022 AT 8:18 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

No problem whatsoever. I'm just interested in knowing if you are taken care of.

Let me know what I can do to help.

Take care,

Joe
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Thursday, June 30th, 2022 AT 8:48 PM
Tiny
AOKROGERK
  • MEMBER
  • 5 POSTS
Just heard back from repair shop. It did turn out to be the Crankshaft Sensor as you had suggested. They could not get a code to produce. I advised them of your information, and they were eventually able to take care of the problem by replacing the sensor. Thank you for your wonderful help!
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Friday, July 1st, 2022 AT 8:59 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

You are very welcome. I'm just glad to know it's fixed. That sensor throws a lot of people off because it may or may not set a code simply by design.

Regardless, take good care of yourself, and please feel free to come back any time in the future if you have questions. You are always welcome here.

Take care and Happy 4th!

Joe
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Friday, July 1st, 2022 AT 8:43 PM

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