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Old Mar 30, 2009 | 01:42 PM
  #1  
ChevyCamaro1990's Avatar
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From: Virginia Beach
Car: Camaro RS
Engine: 3.1l v6
Transmission: 700r4
engine vibration

I still havnt been able to track this engine vibration down..i changed the plugs have not done wires yet but they are working ive spun the torque converter to a different location and choose the best and the motor mounts are fine along with the transmission mounts im unsure what could cause this problem
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Old Mar 30, 2009 | 02:22 PM
  #2  
Atilla the Fun's Avatar
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From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: engine vibration

Finish the tune-up, including cap, rotor and wires, to rule out misfiring.
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Old Mar 30, 2009 | 02:57 PM
  #3  
ChevyCamaro1990's Avatar
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From: Virginia Beach
Car: Camaro RS
Engine: 3.1l v6
Transmission: 700r4
Re: engine vibration

cap and rotor is band new all the wires have like 29 Kv going through them i have a tool for checking so i kno there not bad
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Old Mar 30, 2009 | 03:07 PM
  #4  
GICATA's Avatar
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From: Grand Junction, Co
Car: '83 WS6 T/A 65,000 miles
Engine: 5.0L vin H stock, 406SBC right now
Transmission: T-5
Axle/Gears: Corp. 3.73
Re: engine vibration

DOH!! see below.

Last edited by GICATA; Mar 30, 2009 at 03:14 PM. Reason: I'm a bad typist.
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Old Mar 30, 2009 | 03:13 PM
  #5  
GICATA's Avatar
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From: Grand Junction, Co
Car: '83 WS6 T/A 65,000 miles
Engine: 5.0L vin H stock, 406SBC right now
Transmission: T-5
Axle/Gears: Corp. 3.73
Re: engine vibration

What if they (the wires/plugs) are good while you check them and are not arcing to a manifold or bolt when the engine is running?

Are you using quality parts? NAPA, Autozone, Car Quest, etc etc will sell you the junkiest krapola for the sales promos they get. Use GM or NGK plugs and high quality wires. Please stay away from Bosch and Autolite stuff.

Are you sure there is no out of balance problem like a broken piston skirt, bad flexplaye/flywheel, out of phase crank damper or even major internal problems?

What if an injector isn't spraying fuel, or is leaking?
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Old Mar 30, 2009 | 03:18 PM
  #6  
John 89 Formula's Avatar
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From: Everett, MA . USA
Car: 89 FORMULA FIREBIRD, 86 CHEVY CAMARO
Engine: L98, LB9 RESPECTIVLY
Transmission: 700 R4 (BOTH)
Re: engine vibration

Check your motor mounts again the back side of one or both may be resting on the crossmember. I had the same problem in one of my cars, drove me nuts for a year until I discovered the bad mount.
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Old Mar 30, 2009 | 03:31 PM
  #7  
ChevyCamaro1990's Avatar
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From: Virginia Beach
Car: Camaro RS
Engine: 3.1l v6
Transmission: 700r4
Re: engine vibration

Originally Posted by GICATA
What if they (the wires/plugs) are good while you check them and are not arcing to a manifold or bolt when the engine is running?

Are you using quality parts? NAPA, Autozone, Car Quest, etc etc will sell you the junkiest krapola for the sales promos they get. Use GM or NGK plugs and high quality wires. Please stay away from Bosch and Autolite stuff.

Are you sure there is no out of balance problem like a broken piston skirt, bad flexplaye/flywheel, out of phase crank damper or even major internal problems?

What if an injector isn't spraying fuel, or is leaking?
im sure its not the injectors and im 100% sure its not a broken piston just had the motor apart not long ago and yes i use quality parts and i havnt seen the wires arcing to the manifold or any bolts
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Old Mar 30, 2009 | 03:32 PM
  #8  
ChevyCamaro1990's Avatar
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From: Virginia Beach
Car: Camaro RS
Engine: 3.1l v6
Transmission: 700r4
Re: engine vibration

Originally Posted by John 89 Formula
Check your motor mounts again the back side of one or both may be resting on the crossmember. I had the same problem in one of my cars, drove me nuts for a year until I discovered the bad mount.
i will double check but they looked new before when i looked
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Old Apr 1, 2009 | 06:53 AM
  #9  
ChevyCamaro1990's Avatar
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From: Virginia Beach
Car: Camaro RS
Engine: 3.1l v6
Transmission: 700r4
Re: engine vibration

i was wondering if anyone has a clue as to what the resistance for the injectors should be dead cold?
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