2003 Pontiac Montana Check Engine Comes On Flashes 30 Mph Loss Power Rough Idle

2003 PONTIAC MONTANA
165,000 MILES
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Check engine comes on and flashes at 30 mph,loss of power,rough idle
Jan 26, 2013 at 6:13 PM
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CARADIODOC
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
STOP THE ENGINE! A flashing Check Engine light means way too much unburned fuel is going into the exhaust system and the catalytic converter is going to overheat and melt. That will turn an expensive repair into a really expensive repair. The rough running is due to a misfire and is the likely cause of that unburned fuel.
Jan 26, 2013 at 6:29 PM
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