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I got a Hyundai Santa Fe 2007 2.2 CDRi, engine code D4EB i got problem with the acceleration.

When i press the gas pedal it takes long time to get acceleration. between 1000 rpm and 2000 rpm it goes slowly. But from 2000 and up goes much faster.

I have cleaned the fuel filter, i have cleaned the egr. I don't know if it's the maf sensor or the egr. I think it's one of them. When i take of maf sensor i can max accelerate to 3000 rpm. I don't have any fault codes. I don't know what to do. I think it's the maf sensor but i don't know. When i connect the Bosch it calculates that it read like 23 air kilo/h. When i press max at the pedal it can be like 400 kilo/h. So i don't know...
After i changed the maf sensor the car is heavy to start, and doesnt work to start with both the used one maf sensor and the old one.


What should i look after?

Yours Nasho
 

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It was EGR valve, just cleaned it.
All together 3 hours work and now works fine.
Also fuel consumption went down significantly.
 
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