SPONSORED LINKS

When attempting to accelerate there is engine hesitation, why?

Tiny
BENITOV0415
  • MEMBER
  • 2015 SUBARU WRX
  • 2.0L
  • 4 CYL
  • 4WD
  • MANUAL
  • 78,000 MILES
The car drives fine when I don’t get on it. Once I try to give it a little more gas, then it seems to be hesitant around 3,000-4,000 RPMs. No check engine light. The exhaust has a little rattle when I start moving then it goes away.
I’ve changed oil, and spark plugs.
The boost seems to be fine.
SPONSORED LINKS
Wednesday, July 19th, 2023 AT 9:29 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

The exhaust rattle got my attention. Do you know if it is a simple heat shield, or does it come from the internal portion of the catalytic converter?

I ask because the inside of the converter can come loose and move around restricting airflow. If that is what is happening, you certainly could feel a power loss.

Take a look at this link:

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

Take a rubber mallet and tap the exhaust to see if you can recreate the sound. This will help pinpoint where it's coming from and if it could be the inside of a catalytic converter.

Let me know

Take care,

Joe
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, July 20th, 2023 AT 7:37 PM

Please login or register to post a reply.

Related Engine Hesitate Content

Vacuum Leak Test and Repair
VIDEO
Vacuum Leak Test and Repair
Instructional repair video
Hesitation
GUIDE
Hesitation
An engine hesitation is an interruption of continuous power during acceleration. When a engine is hesitating it will cause the car to lunge or surge which will cause a...
VIEW MORE

Sponsored links