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93 LT1 ruffness at 1000 rpms

  • Thread starter Thread starter K1WY
  • Start date Start date
K

K1WY

Guest
Any ideas on a ruffness at 1000 rpms. New plug wires and coil wire. Run strong above 1000. Idle is good.
 
30,000 miles on the car. I have a new optispark unit, really don't want to change it if at all possible !

No error codes show up using Ez-Link scanner.
 

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