2003 Mazda 6 White Smoke from tailpipes

ARPROK13

MEMBER
2003 MAZDA 6
6 CYL
FWD
AUTOMATIC
84,000 MILES

For the last 6 months, I have been getting billowing white smoke from my tailpipes during start-up and sometimes at idle. However, it doesn't happen all the time. For example, It would happen for 2-3 days, then it would be fine for 2-3 weeks. I have taken it to the dealership and they replaced the throttle body, throttle body gasket, and intake hose. It still did not fix the problem. I don't have any coolant loss, I have bad gas mileage. Recently, the car would shake at start up.

Tuesday, July 1st, 2008 AT 9:21 AM

1 Reply

KHLOW2008

MECHANIC
41,814 POSTS

Hi arprok13,

Did you check the radiator coolant level or just the reserve tank?

If the engine is shaking, it is misfiring and the white smoke is most probably due to excessive gas being processed by the catalytic converter.

You need to check the spark plugs, observe which cylinder is not firing well through the carbon buildup on the plugs and you might find out which cylinder is not working well.

Could be plugs, coils, injectors or their wiring.

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Tuesday, July 1st, 2008 AT 11:41 AM