Hesitation

[IceBoy]

Hi All,

 

Had the Gal treated to a full service including MAF and Fuel filter and under full throtle she is hesitant....the power is there but like a very short bursts/wave like.

 

It is much better than it was before the service.....what else could it be?

 

Thanks in advance.

 

PS...getting around 440 miles to the tank.

 

IceBoy

[tim-spam]

I know you've had the MAF replaced, but it does sound like the MAF is not working properly.

 

Does your car accelerate well as you press the accelerator, but then hesitate at around 2000rpm? If you release the accelerator and then press it down again, does the car accelerate well and then pause again once the accelerator reaches the floor? Is the problem more noticeable in the higher gears?

 

If the answer to all of the above questions is yes, then that would point to a MAF on its way out - are you sure that the MAF was actually replaced?

[Neils TDi again]

It is possible you have a drity track on the throttle pedal sensor and the ecu loses the position during hard acceleration, i had it with my MK1 it would eventually result in the MIL being lit and Limp Home mode cutting in.

 

Using the diagnostic it is possible to see the first trip fault logged if you can catch it before you switch the engine off.

 

Alternatively it may be the throttle positon sensor in the intake manifold the same can occur.

[IceBoy]

Thanks All,

 

MAF has been replaced with original part.

 

It is more noticeable at higher speeds and over 2400rpm.

 

So I will check the throtle sensor.

 

Thanks once again.

 

IceBoy