What is your question?
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What is your question?
My 2007 400h gets terrible gas mileage and has for years. Dealership claims its the cold weather. Its never been tuned. Dealership says the plugs last 100K miles. We are now at 104,000 and the engine runs very rough. What to do?
2 Replies
depends on plug make. If there platinum its 60,000 if there iridium double platinums its 120,000. If there the originals on the car its time to change them reguardless but it could be an ignition coil aswell. Needs diagnosis at a repair shop for sure
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