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Accelerate but then it jerks hard and sometimes stalls?

Tiny
DADDIEBABES
  • MEMBER
  • 2009 AUDI QUATTRO
  • 23,500 MILES
So, I just bought the vehicle listed above Q7 Quattro. There are no service lights on but when I start to drive it goes then drops in acceleration and jerks at the same time before stalling. Still no check engine light or any other service light. Decided to do the reset trick where you hold the gas pedal for 15 seconds, turn the vehicle to the on position and then turn off for 4 minutes then turn on and drive it for 15 minutes, did not work. Decided to then clean the Throttle Body and it seemed A little better but still skipping or jerking when I'm accelerating? Does anyone have any recommendations or has anyone delt with this problem before or similar and what procedures did you do to correct the issue?
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Wednesday, June 14th, 2023 AT 10:28 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

What I suggest is to scan the can-bus system. This vehicle has several modules and any of them could be storing codes.

CAN stands for controller area network. Basically, the different modules are tied together via a few wires. This type of scan will retrieve codes regardless of the module storing them.

Here is a link that shows how it's done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Let me know if that is something you have already done or something you can have done.

Take care,

Joe
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Wednesday, June 14th, 2023 AT 11:18 PM

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