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

missing at crusing speed

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Old Jun 12, 2010 | 10:08 PM
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Default missing at crusing speed

so from 2500-3000 rpm it misses or studders. If I rev it up to 3k it goes away and pulls great till 6k. It idles good with no missing so I don't think its a melted plug wire. Has msd opti and coil. No check engine light.

Where should I start?

Thanks!
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Old Jun 12, 2010 | 11:45 PM
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A low rpm miss like that which goes away at higher rpms is usually a shorting issue. Make sure you dont have a melted wire although you dont "think" it is you need to check.

Could also be a tear in a boot by the opti, etc. I had one like that.

Was sparking out the back of the boot on the opti side. Taped it up and all good now.
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Old Jun 12, 2010 | 11:45 PM
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Check your plug wires first. That's what itsounds like to me. Then get the car scanned somecodes don't throw a check engine light. You can try unplugging the maf to make it run in closed loop to rule out the maf and oxygen sensors.
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Old Jun 13, 2010 | 06:09 PM
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Thanks for the tips, my bad. Yah it was a wire. #2 coming off the opti was half off...
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Old Jun 13, 2010 | 06:54 PM
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....or you could do what most do and keep beating the nuts off the car until that problem isnt your biggest one anymore?
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Old Jun 13, 2010 | 06:58 PM
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^lmfao
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