SAFARI

4 PL FUEL SYSTEM

Assembly :

Vapour hoses connections varies for each type of

joint.Necessarycare tobe takentoconnect andclamp

each hose correctly. Use suitable tool for fitment of

clamp.

Donot kink/pinchor twisthosewhentheyare routed.

This will reduce the effectiveness of the emission

control systemandmay damage to fuel tank etc.

Tank pressure valve must be fitted right way round.

Theport bearing theword“Tank”(tank end)must be

positioned towards the tank. The port bearing the

word“CAN”(canisterend)mustbepositionedtowards

the canister.The vacuum port to be connected to T

connector which is connected to intake manifold.

(Refer schematic circuit diagramFig. 22)

NOTE :

Unless replacement is necessary,it shouldnot be removed

from the circuit. Do not apply an excessive force to the

tank pressure valve nipple. This may result in bend /

damage.

d) Carbon canister : Fig. 23 & 24

A canister made of high grade Nylon 66/PA66,

containing special dust free activated carbon is used

to adsorb fuel vapours.The lower endof the canister

is open to atmosphere for ventilation.The end is not

really open but there is foam filter. The purpose of

the bottom filter is to protect the canister fromdust

and dirt during operation. When the engine is

inoperative (i.e.whileparked) fuel vapoursgenerated

inside the fuel tankdue to fuel volatility are absorbed

andstored inthecanister throughtankpressurevalve.

When the engine is running, the fuel vapours

absorbed in the canister are purged into intake

manifold through canister purge valve operated by

ECU.Thepurgingtakesplaceduetoairdrawnthrough

the canister sbecause of pressure differential

betweenmanifold vacuumand atmosphere.

Removal:

Disconnect hose ( from canister to purge valve).

When the air is blown intoTank port,there shouldbe

no restriction of flow through Purge port and Air

port(i.e. canister bottomport).

If the operation differs from the above description,

canister must be replaced.

Connect hoses to canister.

Ensure that hoses are clamped securely.

Warning :

Donot suck air through canister port. Fuel vapours inside

canister is harmful.

Fig. 24

Fig. 23