97 bonneville engine help
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True Car Nut
Joined: Dec 2009
Posts: 9,616
Likes: 594
From: western,ny state
if you have codes the monitors wont complete. if not which one is not working? the cat and evap need starts over freezing temps but not engine already warm so sometimes it never even tests for a long time depending on your climate. the tank for evap has to be between 7/8 and 1/8 full too. so its pretty picky
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