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Slow Pickup and transmission shifting?

Tiny
ERVINW
  • MEMBER
  • 2007 NISSAN BLUEBIRD
  • 1.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Seems to be not changing the gears quickly at about 50km and sometimes after braking, the pickup may be a bit slow. I have cleaned the throttle body and the Mass Air Flow Sensor. There are no check engine lights or codes.(Nissan Bluebird Sylphy 2007)
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Wednesday, May 15th, 2024 AT 8:39 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,468 POSTS
This can happen when the catalytic converter starts to clog up and lower engine vacuum making the engine computer think the car is going up a hill which holds the gears longer. This guide can help confirm the issue:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Also, we should run the codes to see if any are stored.

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

Please go over these guides and get back to us.
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Thursday, May 16th, 2024 AT 12:16 PM
Tiny
ERVINW
  • MEMBER
  • 4 POSTS
Sorry about the tardy response, I will try these as soon as the weather permits and provide feedback. I only have weekends available.
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Monday, May 20th, 2024 AT 12:32 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,468 POSTS
No worries, let me know how things go.
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Monday, May 20th, 2024 AT 12:47 PM

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