Lotus TURBO ESPRIT Service Manual page 422

Page 50
If
the throttle position switch requires adjustmen ~t, check first
SECTION L D
that the warm i d l e speed
a
i s
correct. Slacken the throttle position switch mounting screws before making any i d l e
speed adjustment
.
When completed, rotate the position switch slowly u n t i l continuity
i s
JUST
made, and tighten screws. Recheck setting.
0
-
AIR LEAKS IN EXHAUST/INLET
To check for a i r leaks i n the exhaust and inlet system:
Disconnect the turbo to diffuser hose, and apply a n airline w i t h a suitabl'e sealing
adaptor into the diffuser. Seal the exhaust tailpipe with a bung.
Paint a l l inlet/exhaust system joints and seals with a soap &water solution and
check for leaks whilst applying a n a i r pressure o f
5 Ib/in2
into the diffuser.
P
-
THROTTLE IMBALANCE
If
throttle imbalance i s diagnosed i n procedure LD23, check the throttle
position switch switch adjustment (LD24N).
CAUTION The throttle bodies and inlet manifold assembly are balanced
as a car set by mass flow, and rhe throttle bleed channels permanently
sealed a t the factory. Although provision
i s
made for measuri hg the i n l e t
manifold depression on cylinders
2
& 3
and adjusting the throttle spindle
coupling, this setting should not be disturbed unless essential
.
Throttle imbalance can only be caused by abuse o f the thrott1e:spindle assembly,
or replacement of a throttle lever or return spring.
Investigate a l l other potential causes of incorrect C O levels before proceeding.
Tools required: Special Diffuser TOOOT0583
Coupl ing Spanner ~ 0 0 0 ~ 0 5 8 4
Manometer TOOOT0499
Balance Tubes TOOOT0496 (2)
Remove the blanking plugs from i n l e t tracts 2 and 3 and f i t the balance tubes
TOOOTOQ96. Connect to manometer. Remove diffuser, and f i t special diffuser
TOOOT0583 i n its place.