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Old 08-09-2010, 06:38 PM   #14
70BLAZERX2
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Join Date: Jan 2010
Location: GREENEVILLE TENNESSEE
Posts: 1,311
Re: 1990 chevy code 42

next to the throttle body, on the passenger side,on the metal bracket,there is a small black box about 2 x 3 inches..with a plug on it,That is the EST module..change that with another..My roadmaster did the same thing,that fixed it.
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