Thread: Speedo going nuts
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Old 04-16-2008, 09:48 PM
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6t8stang 6t8stang is offline
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Join Date: Oct 2006
Location: Philly Suburbs, PA
Cobra Make, Engine: BDR#436 - 351W - 450HP / 429TQ
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I had a problem where the speedo would jump up (not all the way to 140) and sometimes stay there when I came to a stop - the odometer kept ticking up though. Turned out to be a bad ground on the MSD ignition box under the dash. Grounded it to the bracket the MSD box is on and problem went away.
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