2004 NISSAN VAN 巨費油，18加侖隻跑240邁，請高人指點怎麽檢查

車上顯示 local 15.0，應該16以上吧，覺得發動機空轉時最費油。想修一修，怎麽檢查呢？謝謝

所有跟帖： 

• 先去autozone免費掃描,檢查看有什麽code -滿地找牙- ♂ (118 bytes) () 09/26/2011 postreply 17:52:18

• 7年的車，正常。 -biglow- ♂ (0 bytes) () 09/26/2011 postreply 19:04:10

• Bad MAF makes idle speed unstable. There is no code. I had the -buddy1234567us- ♂ (0 bytes) () 09/27/2011 postreply 07:54:29