Lotus TURBO ESPRIT Service Manual page 410

Page 38
F i t
the pressure gauge a t the fuel distributor inlet connection, and a t the secondary
fuel pump outlet connection (see Section 'A') and record rate of pressure drop to
establish faulty component.
Possible causes of control pressure leak:
i)
Control pressure shut off valve leaking.
Replace.
Use new sealing washers whenever re-making a fuel system connection, and refer to
fuel system torque settings Section LD
25.
C
-
AUXILIARY AIR VALVE
Cold Test
If
the engine i s not cold, the valve may be removed and cooled by freezer.
Remove both
b&
from the unit, and with the aid of a mirror and lamp, observe the
position of the valve plate, which should be partially open, dependent on temperature.
I f the valve i s completely closed, replace the auxiliary air valve.
Quick Test: Clamping off an air valve hose on
a
cold engine should reduce idle
rm.
A i r Valve
Hot Test
D'aconnect
R P M
relay and bridge connector block termiml;
30
and
87.
After a maxlmum of
5
minutes the auxiliary air w l v e must be completely closed aided
If
necessary by tapping the valve assembly with a soft faced mallet t o compensate for lack
of engine vibratlon.
If
the valve does not close completely, check the electrical feed to the valve and
reststance of the w l v e heati
-Q
coil for open circuit. Replace
if
defective.
Qvick Test: Clamping off an air valve hose on a warm engine should have no
effect on idle rpm.