Car shaking/choking after EGR disconnection, when pressing accelerator pedal

1999 MERCURY COUGAR
250,000 MILES • 2.0L • 4 CYL • 2WD • MANUAL
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WISH30
  • MEMBER
  • 124 POSTS
After I unplug EGR valve the car runs smoother and better, no jerking as before, but when drive in some speed and press the accelerator pedal smoothly to accelerate more. it often shakes (I think this is correct word in English) Like acceleration late.
Oct 14, 2020 at 6:13 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Hi,

Can you explain why the EGR was disconnected? Are there any diagnostic trouble codes that have been retrieved? If there hasn't that should be done. Here is a quick video showing how it is done:

https://youtu.be/b2IJGfImVvw

Let me know if there are codes. Also, let me know if the jerking started all at once.

Joe
Oct 14, 2020 at 12:25 PM
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