1993 Mazda 626 Hi Just Replaced Another Motor Runs Well You Come Car Being Set

1993 MAZDA 626
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MARIOC1
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Hi I just replaced another motor in my Mazda 626 and the motor runs well but when you come to the car being at a set of lights or in drive but not moving it vibrates badly, we have taken it to Ultra tune and they think it might be the 2nd computer reading incorrectly and making it idle like this does that make sense? Please help?
Jan 4, 2013 at 6:27 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
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start with a compression test, fuel pressure and spark test

Roy
Jan 4, 2013 at 10:15 AM
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