Turn off the engine and reach under the intake between the distributor and the power steering pump. There is a hose for the idle system that will blow off of the bottom...you can't see it, but if it's blown off, you will feel it.
1991 GMC Syclone
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
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