n******t
发帖数: 1281 | 1 2007 Chev Malibu
发动机转速在1500转左右时（与车子是否行进中没有关系），感觉脚底发动机方向处有
嗡嗡的共振声，高于或者低于这个转速就消失了，请问咋回事？好修吗？
谢谢！ | t******6
发帖数: 9093 | 2 火花塞什么的换了吗？
【在 n******t 的大作中提到】
: 2007 Chev Malibu
: 发动机转速在1500转左右时（与车子是否行进中没有关系），感觉脚底发动机方向处有
: 嗡嗡的共振声，高于或者低于这个转速就消失了，请问咋回事？好修吗？
: 谢谢！
| n******t
发帖数: 1281 | 3 与火花塞可能关系不大
我两年前刚换的一套6个依金的火花塞
网上有人说可能是车的一个sweet spot，也就是每台发动机都有的一个共振频率点
Sears Auto的人猜测说可能是发动机里一个vacumm hose松了，但是一般的店不能修，
只能去dealer那里去修
～～～
【在 t******6 的大作中提到】
: 火花塞什么的换了吗？
| n******t
发帖数: 1281 | 4 在网上找到的：
Chevrolet Malibu: Problems & Solutions
Built After January 16, 2004
with 4T45E Automatic Transaxles (RPO MN5) Built Between Julian Date 4016 and
4126 and
3.4L or 3.5L V6 Engine (VINs E, 8 - RPOs LA1, LX9)
This bulletin is being revised to include a repair procedure and parts
availability information.
Please discard Corporate Bulletin Number 04-07-30-021 (Section 07-
Transmission/Transaxle).
Condition
Some customers may comment on a growl or howl type noise during light to
moderate acceleration from a stop. This noise is load and engine RPM
sensitive and will occur between 1500 RPM to approximately 2300 RPM. The
noise is most noticeable in first and second gear. The noise may dissipate
prior to the 1-2 shift, but will be noticed again in second gear depending
on the load and engine RPM. The pitch of the noise will change during the 1-
2 shift.
Cause
The noise is due to the new 5/8 inch drive link assembly being at a resonant
frequency during certain driving conditions.
Correction
Important
Only RPO MN5 transaxles built between Julian date 4016 and 4126 have 5/8
inch drive link assemblies. Refer to Transmission ID and VIN Derivative
Location, SI Document ID #760312 for Julian date location information.
Follow the service procedure below to replace the 5/8 inch drive link and
sprockets with a 7/8 inch drive link and sprockets |
|
