Bad acceleration after fuel tank is filled up

ARSED HOXHAJ

MEMBER
2006 MERCEDES BENZ R350
2.9L
V6
TURBO
4WD
AUTOMATIC
150,000 MILES

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?

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
48,363 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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Bad acceleration after fuel tank is filled up

1 Reply

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