Car jerks while trying to pass a car or take off hard from a stop?

2002 BUICK REGAL
95,220 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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RALPHP1254
My car listed above has an issue where if you try to pass someone, it jerks really bad. I tried everything other than ignition coils to see what was causing it.
Feb 21, 2025 at 1:54 PM
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CANNON1349
  • ASE Certified Mechanic
  • 861 POSTS
  • ASE Certified Mechanic
Hello, have you had the CAN system scanned recently? It can be done at any auto parts store for free, or a scan tool can be bought from Amazon for around $20.

Here is a link to a scan tool: https://a.co/d/jbI5QD4

Here is a link to our article on scanning the CAN system: https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Let's see what codes are in the memory and we can go from there.

Please let us know,
William
Feb 21, 2025 at 7:02 PM
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RALPHP1254
  • MEMBER
  • 22 POSTS
The only codes were PO420 and PO102.
Feb 21, 2025 at 7:22 PM
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CANNON1349
  • ASE Certified Mechanic
  • 861 POSTS
  • ASE Certified Mechanic
Hi, P0102 indicates low airflow through the MAF (Mass Airflow Sensor), let's start with the basics and check the engine air filter. This should be a large black box with a snorkel on it, and if it is very dirty it could cause some issues with acceleration. We should also look / listen for vacuum leaks or any kind of air leak in the intake system. This can usually be heard while the engine is running and typically sounds like air blowing or sucking into the tube. Next will be the MAF itself, see if it is damaged, or even dirty. The element could need a cleaning (only use MAF cleaner!).

Please let us know and report back,
William
Feb 21, 2025 at 7:27 PM
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