的确是换油后才出现的毛病.上次换油后发现机器声音不对

的确是换油后才出现的毛病.上次换油后发现机器声音不对,立既去找dealer,人家不承认.一月后,问题更严重,人家更不承认.然后开一长串修理单, 包括change time belt, 那可是在３年前at the same dealer did it, although the owner of the dealer changed. The service advisor did not admit my car had the time belt changed since she could not find the record there. finally, the manager said he found the record. From then on, I no longer believe this dealer where I had my car maintenance for 10 more years. Then trying to figure out the solution, I had my friend changed the spark plug and air filter, then the problem had gone.