Possible switch between open to closed loop mode

来源: biglow 于 2010-01-23 11:35:09 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (220 bytes)

Better check EGR valve, solenoid, and vacuum. The sudden change in mixing ratio may cause the problem, and it could be caused by a bad or dirty EGR valve. A second guess would be MAP sensor and fuel line pressure issue.

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