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#1
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vibration
Greetings,
Marry Christmas to everybody! Cherokee 1999 Laredo There is very slight vibration of the engine. I changed the spark plugs. It didn't help a lot. The tester in the service did not show anything. What else could be the problem? Best regards Orlin |
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#2
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vibration
orlin wrote:
> Greetings, > > Marry Christmas to everybody! > > Cherokee 1999 Laredo > > There is very slight vibration of the engine. I changed the spark > plugs. It didn't help a lot. The tester in the service did not show > anything. What else could be the problem? At what RPM? If the vibration is at idle it could be a dirty throttle body or idle air passage/stepper. A spray with throttle body cleaner will fix that. How do the motor mounts look? http://revbeergoggles.com/motormount/ -- DougW |
#3
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vibration
Dear Doug,
The vibration is constant. However I can feel it more at the low RPM. Before it was worse. After I changed the spark plugs it is not so sensible, but it is there. DougW wrote: > orlin wrote: > > Greetings, > > > > Marry Christmas to everybody! > > > > Cherokee 1999 Laredo > > > > There is very slight vibration of the engine. I changed the spark > > plugs. It didn't help a lot. The tester in the service did not show > > anything. What else could be the problem? > > At what RPM? If the vibration is at idle it could be a dirty throttle > body or idle air passage/stepper. A spray with throttle body cleaner > will fix that. > > How do the motor mounts look? > http://revbeergoggles.com/motormount/ > > -- > DougW |
#4
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vibration
May be your harmonic balancer is has spun in it's rubber mount.
Take a screwdriver and follow number one piston up for top dead center to see if it still matches the timing marks: http://members.cox.net/wilsond/hb/ God Bless America, Bill O|||||||O http://www.billhughes.com/ orlin wrote: > > Dear Doug, > > The vibration is constant. However I can feel it more at the low RPM. > Before it was worse. After I changed the spark plugs it is not so > sensible, but it is there. |
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