my 2002 mazda millenia is running rough while idleing and on takeoff until i get to about 60 mph. It all started when my gas needle wasnt working and i coasted in to a gas station. ever since engine light is on and car running rough, could this be a vacum leak?

Asked by Sep 12, 2015 at 03:04 PM about the 2002 Mazda Millenia 4 Dr Premium Sedan

Question type: Maintenance & Repair

1 Answer

148,385

Maybe. Probably in fact But also fuel pump. The gasoline is the coolant for the pump. When you run out of gas the pump does not 'know' this and keeps attempting to supply fuel... but running well at 60 mph shoots this answer to heck. The most common reason for the CEL to light up is gas cap. There are several ways to check/find a vacuum leak, one of which is an unlit propane torch waved around the engine and if it begins to idle smoothly you have found vacuum leak. But please please be very cautious if you try this.. I hesitate to even suggest that method but it works.

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