car pulsates

[xTSIx]

Im just wondering as to why my car kinda pulsates when i drive down the road at a steady speed and rpm? only lower speeds like up to 40 then it doesnt but under 40 after a while it will. any ideas?

 

[Birt96gst]

you might have a boost leak do a test and see if thats the problem

 

[polonez]

Ive noticed mine pulsating while very slowely accelerating it kind of feels like it pulls and stops pulls and stops. I couldnt figure it out.... but then i looked over at the A/F (lightshow)guage and noticed that the car was in closed loop and everytime my A/f went to rich it would "tug" a little and it felt like it was pulsing. I might need a new o2 sensor or this might be just normal Im not sure but this might be your problem

 

[danny_l_2005]

that used to happen to my car but my was in a different situation. Whenever i would be going around 60 and i would boost to 12 or 14 in the expressway I would feel the pulsation. I asked here in the forums but no one replied. But then when i got my walbro 190lph and installed it I did not have that problem anymore. Must been my pump not giving enough gas