Volvo 760 GLE Turbo 1986 Manual page 108

1986 Volvo 760 GLE, Turbo
Vacuum fittings, hoses and connections
Unstable idle, misfiring, or poor emission control is often caused by leaking vacuum hoses or connections. Check hoses and connections on
distributor vacuum unit, connections on heater control servo systems and hydraulic brake servo.
Checking and adjusting idle speed
Your Volvo is equipped with an electronically controlled idle speed system that requires no checking or adjustment.
Fuel system cap, tank and lines, and connections
The effectiveness of the fuel system to contain hydrocarbons is dependent largely on a leak free system. Check for proper sealing of
gasoline filler cap which contains "0" ring-type seals. Check all evaporative hoses in vehicle for tightness. Check fuel lines under vehicle
and repair if necessary.
Fuel (line) filter
The fuel filter is located on the left suspension tower brace. This filter is to be changed every 60,000 miles (96,000 km). The filter is
replaced as one complete unit.
Replace more frequently if contaminated fuel is introduced into the tank (or if there is reason to suspect that this has occurred).
Timing Gear Belt (Turbo Models only)
The timing gear belt should be adjusted at the 600-1200 mile (1000-2000 km) inspection. We recommend that the belt be replaced every
50,000 miles (80,000 km).
pg. 101 Servicing
Special instructions for work on the fuel injection system
Extreme cleanliness is essential when working on the injection system. Great care must be observed.
Injection system service should be handled by qualified technicians only, using equipment intended for this service.
1 Air-fuel control unit
2 Fuel distributor
3 Frequency valve
4 Injector
5 Tank pump
6 Fuel pump
7 Pressure accumulator
8 Fuel filter
9 Control pressure regulator
10 Start injector
11 Air control valve (constant idle speed system)
12 Throttle valves
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