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    The idle is high in my 1990 Aerostar. I might have a vacuum leak.

    i have a 90 Aerostar that I am trying to go through smog testing. I was told that the NOtest was high and that the other gases they check were good. They told me that the idle was too high (1350rpm) and was probably due to a vacuum line and also the reason they couldn't complete the test. can...
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