Runs rough

Nreed

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I have a little story so the car had crank no start issue so I replaced the icm which made it crank well now it idles ok not good but ok and when I accelerate the rpm’s bouncy and it jerks then when I go to let off gas rpm’s jump to about 7000 then drop all the way back to normal idle any ideas?
 

95opal

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I have a little story so the car had crank no start issue so I replaced the icm which made it crank well now it idles ok not good but ok and when I accelerate the rpm’s bouncy and it jerks then when I go to let off gas rpm’s jump to about 7000 then drop all the way back to normal idle any ideas?
Sounds like a loose tack signal wire at the coil or in the harness.
 

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