bad acceleration after fuel tank is filled up

2006 MERCEDES BENZ R350
150,000 MILES • 2.9L • V6 • TURBO • 4WD • AUTOMATIC
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ARSED HOXHAJ
  • MEMBER
  • 1 POST
My car is the R 320 model. My car has bad acceleration after filling the fuel tank. It has automatic gearbox.
After I fill the fuel (diesel) and start the trip the car has bad acceleration. it does not exceed 1500 rpm and delayed to reach maximum speeds even though I pushed the gas pedal to the end.

Then when I stopped the car and rest for more than thirty minutes and start the trip again it gain the power again and it reaches 100 km/h very fast.

Can anyone tell me why this happens everytime I fill the tank ?
Aug 13, 2017 at 2:23 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,199 POSTS
Hello,

It sounds like you have a primary pump that is going out and the weight of the fuel is causing the problem. Here is a guide that will give you an idea on what you are in for when doing the job.

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

Or you can cut a hole in the body, here is a diagram that will help you see what I'm talking about. (below)

Please let us know what happens, we are interested to see what it is.

Cheers, Ken



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Aug 16, 2017 at 12:15 PM
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