Fuel Pump Operates Improperly Or Not At All; Carburetor Hoods Or Leaks Fuel; Uneven Idling; Faulty Fuel Gauge - Saab V4 Service Manual

Source of trouble Remedy
FUEL PUMP OPERATES IMPROPERLY OR NOT AT All
Leakage at connections and pump housing cover.
Impurities in fuel.
Condensed water
1n
fuel causes fuel system to
freeze up in winter.
Leaking pump diaphragm and valves.
Check fuel-hose connection nipples and cover
gaskets.
Check that pump filter and fuel lines between tank
and carburetor are not clogged.
Check for icing in fuel-pump filter and fuel lines.
Drain tank and refill with fresh fuel if necessary.
Check pump diaphragm and valves, and replace
if necessary. Check pump pressure with manometer.
See Chapter 2.
CARBURETOR HOODS OR LEAKS FUEL
Dirt in needle valve.
Worn valve or seat.
incorrect float level.
Excessive fuel-pump pressure.
leakage at fuel-pipe connections
Damaged float.
Clean valve and seat.
Replace.
Check float level.
Check pressure.
Replace faulty connections.
Replace.
UNEVEN IDLING
Volume-control screw adjusted improperly.
Dirt
in
idling jet.
Idling passage clogged.
Air leakage at carburetor or induction manifold
gaskets.
i
i
Adjust.
Remove, clean.
Remove carburetor and clean passage.
Tighten screws or replace gaskets. Adiust.
FAULTY FUEL GAUGE
Fuel gouge registers too low or too high.
Fuel gouge works intermittently or not at all.
I
Remove tank sender unit and adjust by carefully
bending float arm.
Fit a new gauge or tank sender. unit in order to
localize the fault. Faulty port can either be repla-
ced or sent to laced SAAB agent for repair.
I
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Oct. 1969
030-7
SA.t\8