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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

bad opti = shaking?

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Old Apr 27, 2009 | 06:44 PM
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Default bad opti = shaking?
i replaced the motor/trans mounts with poly ones, which i thought would cure my engine shaking. I have gone over almost everything i can think of
( plugs,wires,fuel pressure @41-42 idle and wot, re set valve lash, new o2 sensors, cleaned and tested about every other sensor, flywheel and converter are tight.

its mostly at idle but follows thru out the rpms off and on, the only thing left i didnt touch are the icm and opti
The engine did not shake this much when the H&C swap was 1st done so it's something that just surfaced, would either of those 2 cause this??
(i spent 2-3hours using search )
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Old Apr 27, 2009 | 07:47 PM
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Even a single misfiring cylinder can cause shaking and rough idle. I'd check to see that you aren't arcing anywhere.
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Old Apr 27, 2009 | 08:49 PM
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Mine was misfiring cause of a burnt plug wire, make sure they are clear of headers.
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Old Apr 27, 2009 | 09:24 PM
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Originally Posted by 00FlowCamaro
Mine was misfiring cause of a burnt plug wire, make sure they are clear of headers.
I am running them otvc , i have a spare set of msd laying around ill throw them on tomorrow and see how it goes
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Old Apr 27, 2009 | 10:24 PM
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Injectors all plugged into the correct harnesses?
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Old Apr 27, 2009 | 11:15 PM
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yeah i had 1 plug wire cut in half and it shook a little bit, but not too badly... but its enough to notice... and before that i had the cut plug wire and my coil wire was arcing like no other.... and it shook a little more
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Old Apr 28, 2009 | 02:25 PM
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Originally Posted by StealthFormula
Injectors all plugged into the correct harnesses?
had to double check that one, but they all look good
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Old Apr 28, 2009 | 02:31 PM
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Originally Posted by C5042081
had to double check that one, but they all look good
Many have said that before.
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Old Apr 28, 2009 | 06:17 PM
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Originally Posted by ss.slp.ls1
Many have said that before.
I really hope it's something i over looked

wires are fine, also tried second set no difference,also swap swaped out a diff coil also no diff
Last edited by C5042081; Apr 28, 2009 at 09:18 PM.
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