a4 2.8 30v shutter/vibration at 14-1500 rpm
#1
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a4 2.8 30v shutter/vibration at 14-1500 rpm
my 98 a4 2.8 30v quattro starts to shutter between 1400 and 1500 rpm in all gears, once out of that range the shutter goes away. I do have a check engine light on however, n it was diagnosed as "secondary intake" (which i suspect and was told was my mass airflow meter) o2 sensors and coolant temperature sensor. I would like to know if any of the problems stated above would cause the car to shutter/vibrate at the stated rpm range.
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It might be your problem.
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my 98 a4 2.8 30v quattro starts to shutter between 1400 and 1500 rpm in all gears, once out of that range the shutter goes away. I do have a check engine light on however, n it was diagnosed as "secondary intake" (which i suspect and was told was my mass airflow meter) o2 sensors and coolant temperature sensor. I would like to know if any of the problems stated above would cause the car to shutter/vibrate at the stated rpm range.
I replaced the Mass Air meter, plugs, wires, coils, even replaced trans fluid and filter and 2 injectors! I still have a shutter in that rpm range. Doesn't mean it is the same issue, but I thought I would share. The trans filter and fluid change made the most notable difference but I still feel it.
Does yours still shutter if you give it more gas...say from a stop light?
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Mine only shutters at that specific rpm range, it's normal up until then regardless of how hard i accelerate, and its perfectly fine once i am out of that range. It does it in all gears though so im pretty sure its not a transmission problem.
#5
2005 A4 Cabriolet 3.0 V6 quattro with 80k miles.
I have a similar vibration at around 1400-1500 rpm. It occurs in neutral or while driving. If I'm rolling it actually seems louder when I corner to the left.
I have a dealer service appointment next week and will post whatever they find out.
I have a similar vibration at around 1400-1500 rpm. It occurs in neutral or while driving. If I'm rolling it actually seems louder when I corner to the left.
I have a dealer service appointment next week and will post whatever they find out.
#6
Throttle Body?
My best guess would be the throttle body. I had the exact same problem on my 99 30v. While driving the problem is non existent. As soon as I am idling and rolling though, or light on the throttle I would get a horrible shudder.
I figured I would start as cheap as I could. Got some seafoam, ran it through my crankcase, vacuum lines, and gas lines. Also removed the Throttle Body and found carbon buildup. I didnt think there was enough buildup to affect the idle. Sure enough though, as soon as I did all of this stuff she run awesome now.
Seafoam - $8.00 Autozone
Clean Throttle Body - PITA but free
Smooth running car - Priceless
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I ran a throttle body cleaning agent directly through the throttle body and the problem continues. My check engine light is on because of it. The codes that come up center around my intake/o2 sensors. I was told to replace my air filter, which i will do next because its cheaper. I already replaced my Mass Airflow Meter and it made no difference. I was also told that if it wasnt air filter that it would be my catalytic converter or o2 sensors.
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#9
I am having a similar issue with my 98 2.8 FWD tip.
I replaced the Mass Air meter, plugs, wires, coils, even replaced trans fluid and filter and 2 injectors! I still have a shutter in that rpm range. Doesn't mean it is the same issue, but I thought I would share. The trans filter and fluid change made the most notable difference but I still feel it.
Does yours still shutter if you give it more gas...say from a stop light?
I replaced the Mass Air meter, plugs, wires, coils, even replaced trans fluid and filter and 2 injectors! I still have a shutter in that rpm range. Doesn't mean it is the same issue, but I thought I would share. The trans filter and fluid change made the most notable difference but I still feel it.
Does yours still shutter if you give it more gas...say from a stop light?
#10
Mine was fixed by replacing a pipe in the power steering. It may have just been air in the line, but there is a tech bulletin about a pipe or hose that was too long and caused the vibration.
Completely counter-intuitive, but it worked.
Completely counter-intuitive, but it worked.