Ford Ranger Maintaince And Repair Manual page 297

29. If equipped with distributor ignition, verify base initial timing as outlined. Check and adjust engine
idle as necessary.
4.0L Engine (VIN X)
The intake manifold is a 4−piece assembly, consisting of the upper intake manifold, the throttle body, the fuel
supply manifold, and the lower intake manifold.
1. Disconnect the battery ground cable.
Begin the intake removal by unbolting the throttle linkage weather shield ...
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HOW TO USE THIS BOOK
... then remove the air intake duct from the throttle body
REMOVAL & INSTALLATION