Vibration
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Junior Member
Joined: Oct 1999
Posts: 70
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From: Sweden
Vibration
I´`ve got an engine vibration at 4200-4500 rpm.When the trans is in neutral, i does the
same thing so it is not the trans or the shaft.
If I put the base timing at 2 before TDC the vibration is less than if the timing is at
8 before TDC.At 2 after TDC the vibration is almost gone, but the car does not work OK in
lower rpm.With the timing at 8 or 10 before
TDC, the car runs great untill I hit 4200 rpm.
Any ideas?
Thanks
89 iroc, 350 motor.
same thing so it is not the trans or the shaft.
If I put the base timing at 2 before TDC the vibration is less than if the timing is at
8 before TDC.At 2 after TDC the vibration is almost gone, but the car does not work OK in
lower rpm.With the timing at 8 or 10 before
TDC, the car runs great untill I hit 4200 rpm.
Any ideas?
Thanks
89 iroc, 350 motor.
Senior Member
Joined: Mar 2001
Posts: 953
Likes: 0
From: LONGVIEW TX . USA
the balancer would be my bet or you have some strange misfire I have been told that you can have problems with the ignition module in the hei and as the rpms go up it can cause a problem such as that.
good luck
good luck
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