Single Point Fuel Injection (TBI)

EFI TURBO MODELS
WARNING: Fuel system pressure must be released any time a fuel line is to be disconnected.

1. Connect fuel pressure gauge C-3292 and hose adapter C-4749 or equivalent to fuel rail service valve.
2. On 1984-85 models, start engine and observe pressure gauge. On 1986-88 models, using ATM tester C-4805, place ignition switch in Run position and depress ATM button to activate fuel pump. Gauge should indicate 51-55 psi pressure, for EFI Turbo models. If pressure is as specified, remove gauge and adapter from fuel rail.
3. If fuel pressure is below 51 psi, install tester between fuel filter hose and fuel line and start engine. If pressure is now within specifications, replace fuel filter. If pressure does not increase, gently squeeze fuel hose. If pressure now increases, replace pressure regulator. If fuel pressure still does not increase, either the fuel pump is defective or the filter sock is obstructed
4. If fuel pressure exceeds 55 psi, remove fuel return hose from pressure regulator end. Install suitable length of hose to pressure regulator and place open end of hose into a clean container. Start engine and recheck fuel pressure. If pressure is now within specifications, check fuel return line for restrictions. If fuel pressure is not as specified, replace fuel regulator.


1984-85 Models

Fuel system pressure should be released any time a fuel line is to be disconnected.
1. Disconnect fuel inlet hose from throttle body and connect pressure testers C-3293 and C-4749 between fuel filter hose and throttle body.
2. Start engine and observe pressure gauge. Gauge should indicate 34-38 psi pressure. If indicated, reinstall fuel hose using new clamp and torque to 10 inch lbs.
3. If pressure is below 34 psi, install tester between fuel filter hose and fuel line and start engine. If pressure is now within specifications, replace fuel filter. If pressure does not increase, gently squeeze fuel hose. If pressure now increases, replace pressure regulator. If fuel pressure still does not increase, either fuel pump is defective or the filter sock is obstructed.
4. If fuel pressure exceeds 38 psi, remove fuel return hose from throttle body. Install a suitable length of hose to throttle body and place open end of hose into a clean container. Start engine and recheck fuel pressure. If pressure is now within specifications, check fuel return line for restrictions. If fuel pressure does not decrease to within specifications, replace pressure regulator.