Passat (B5) :: V6 Bogging Down / Sometimes Hesitates When Trying To Accelerate
Feb 16, 2008
The 2.8 V6 car sometimes hesitates when trying to accelerate. It even has what feel like 'misses' at idle. No codes except catalytic convertor below efficency bank 2. I suspect it could be a bad o2. I looked at vag com, 311-2 and found...
Group 32, Sen1 bank 1 oxygen sensor adpt.@idle 0.0%
Sen1 bank 1 oxygen sensor adpt.@par 0.8%
Sen1 bank 2 oxygen sensor adpt.@idle 0.8%
Sen1 bank 2 oxygen sensor adpt.@par 0.8%
Group 42 bank 2 50Kohm 0.10Kohm inner rest. Sensor 2
Group 41 bank 1 60Kohm 0.50Kohm inner rest. Sensor 2
What measuring blocks should I be looking at? Weird that the car is 'bogging' or 'hesitating' without a misfire being reported.
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I have a '99 Passat and this doesnt happen all the time, but - when I'm idle or accelerating after stopping at a stop sign/light, the car has a bad hesitation and it jumps, then finally goes with no problem. Sometimes it feels as if the car is going to stall out.
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For the last 2 months I have been having an issue with my 2007 Passat when speeding up BUT only up hills. I have brought it to the dealer over a month ago when it was really bad on highways and it barely speed up to 60mph. So I went and got new 4 brand new tires with an alignment. Problem was still there but def. improved the, I guess I really needed new tires! But the hesitation still there, so I went again to VW and they didn't get no error or fail messages when they test drove it.
But I knew my car did not sound like that 3 months ago. So I brought it again and went with them for a test drive and the mechanic felt the hick up speeding up at 60-70 mph as well, you could even see it on the speedometer that it set back for a sec. when accelerating at 60mph but after 70 and 80mph it is riding smooth. VW mechanic only saw a high air intake when it happens and believed it was the engine speed sensor that was failing.
Yesterday I went to the VW dealer for the 5th time and they have it again all day, test drive it and now they say yes it is still doing it. Diag. laptop still shows no signs or fails. BTW, I don't have any start misfires like usually carbon build up cars get!! I did my research online but I see no other Passat's doing that kind of thing. I just don't want to continue driving it and one day my engine just cuts off...The car is balanced and just got aligned, and my steering wheel is not shaking while it happens either. I feel a little hick up from the floor/gas pedal.
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I have the light engine on - and my mechanic has informed me that the O2 sensor on bank one needs to be replaced. I need to understand if the lost of power when accelerating the car can be directly related to the O2 sensor or something else. The car hesitates and takes long to switch gears on my Auto tectronic trany.
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When i accelerate, i can hear the turbo, i don't know if its a problem though.
I drive a 18 wheeler for work, and sometimes when i'm goin down a hill and i accelerate, i get no power, just hearing the turbo loud and clear with no power.
But i barely hear it on the passat, i don't know if its good or bad.
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I have a low drone sound when accelerating, what this could be? Is the Water Pump going?
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It doesn't have anything to do with being at low RPM's and I am not sure if I need to be worried...
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I have a 2007, V-6, 2.7 that idles fine. When placed in gear, it sputters, slow to accelerate and bogs down like it's losing cylinders. I've changed the throttle body, and accelerator already.
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