Question about 1987 GMC Jimmy

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I have a 1987 gmc jimmy with a 5.7 litre fuel injection and it seems to be lack air or has to much i dnt know . and i want to know how to adjust my fuel air mixture

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Unfortunately, most fuel injection engines don't have an adjustable fuel/air mixture by the technician.

The fuel/air mixture is controlled by a computer.

Posted on Jul 03, 2010

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