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engine light and tach problem


sluginxlt

Well-Known Member
Joined
Dec 27, 2007
Messages
157
Age
39
Transmission
Manual
the other morning i started my truck to go to work, and after about 10 seconds running the rpms on the tach start to drop to about 500 at idle and the engine light comes on. my truck isnt running any different at all. even when im on the free way and i know my rpms are over 3k "because of my gearing lol" the tach only shows about 1k. any ideas?:icon_confused:
 
got the codes read and there 18 and 88
 

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