DR-27A Checking Fuel Supply & Return System

This test must be performed with engine warm.

1. Install pressure gauge (Tool C-3292) to fitting on fuel rail, then connect diagnostic read-out tool to engine test connector and press ATM button.
2. If fuel pressure is 53---57 psi, proceed to Test 28.
3. If fuel pressure is below 53 psi, record pressure and proceed to Test 27 step B.
4. If fuel pressure is above 57 psi, proceed to Test 27 step D.