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Jerks when accelerating in lower RPM's

Tiny
CJCJCJ01
  • MEMBER
  • 2015 MITSUBISHI MIRAGE
  • 3 CYL
  • 2WD
  • AUTOMATIC
  • 108,000 MILES
Been doing this for about a year now getting worse. Took to mechanic no code showed up. He charged A/C thinking when the A/C kicks on and off it pulls from the small engine causing the jerking. Seemed to work okay for three -four days now back to doing the same.
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Monday, July 12th, 2021 AT 3:03 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

Are you only feeling this when the A/C compressor engages and disengages? If it does it with the A/C off as well, has anyone checked fuel pressure to see if there is an issue or for an engine vacuum leak?

Here are a couple of links showing how it is done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

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

Also, has the vehicle been tuned up (new plugs) or anything electrical been checked?

Let me know.

Joe
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Monday, July 12th, 2021 AT 9:42 PM
Tiny
CJCJCJ01
  • MEMBER
  • 1 POST
Will keep you updated thanks.
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Tuesday, July 13th, 2021 AT 9:59 AM

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