W 250 Pickup L6-359 5.9L DSL (1989)
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Disconnect the fuel heater ground wire from intake manifold.
Remove the air crossover tube and the intake manifold heater.
Remove the manifold cover and complete the following steps.
CAUTION: Keep the gasket material and any other material out of the air intake.
Clean the sealing surface.
Install the gasket and cover.
