Thread: Glow Shift 3 Cyl Tach in a Metro
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Old 03-05-2009, 02:41 PM   #14 (permalink)
TestDrive
Master EcoModder
 
Join Date: Aug 2008
Location: South Dakota
Posts: 460

WonderWagon - '94 Escort LX
Last 3: 51.52 mpg (US)

DaRedOne - '99 Escort ZX2 Hot

DaBluOne - '99 Escort SE
90 day: 48.97 mpg (US)
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Could be an intake/vacuum leak.
  1. Engine idles down
  2. Mixture goes lean due to leak.
  3. ECU adds additional fuel which causes faster idle
  4. ECU adjusts fuel mixture down due fast idle.
Rinse and repeat.
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