Winnebago 1987-1989 LeSharo Service Manual page 278

DIAGNOSTICS
FAULT • CORRECTION CHART
ENGINE STALLS, UNEVEN IDLING AND GRABS
WHEN CHANGING GEAR
FAULT - PROBABLECAUSE
1. Engine not tuned proper
CHECKS- CORRECTIVE ACTION
Tune the engi ne
2. Vacuum capsule hose punctured, cut or Check the condition and routing of the hose and of
disconnected. the connection of the inlet manifold.
.
3. Punctured vacuum capsule
FAULT - PROBABLECAUSE
Check the capsule (see subsection on "Vacuum
capsule")
GRABSON START
CHECKS- CORRECTIVE ACTION
1. Lack of fluid in c1utch!brake section
2. Improperly adjusted engine idling speed.
Check the fluid level and fill if necessary. Check to
see if fluid is leaking.
Adjust the engine idling speed.
)
J
Jerk when changing from 2nd-3rd with light
throttle.
FAULT - PROBABLECAUSE
1. Light throttle fluid pressure incorrect
2. Defective hydraulic distributor plate
CHECKS- CORRECTIVE ACTION
Check fluid pressure at light throttle when hot :
vehicle traveling at 37 mph (60 km!h), foot off
accelerator, fluid pressure must be 3.5 - 3.6 bars.
Otherwise change hydraulic distributor, its plate
and seals (see "Hydraulic Control Unit" subsection).
Change plate and its seals.
F2-4