D21 Hardbody SE King Cab 4WD L4-2389cc 2.4L SOHC MFI (KA24E) (1997)
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7. Plug intake manifold with a rubber cap.
8. Connect variable vacuum source to fuel pressure regulator.
9. Start engine and read indication of fuel pressure gauge as vacuum is changed.
Fuel pressure should decrease as vacuum increases. If results are unsatisfactory, replace fuel pressure regulator.
