1993 VOLKSWAGEN GOLF catalytic converter

Downloaded from www.Manualslib.com manuals search engine CONTROLS AND EQUIPMEN-=-T-=------___
Starting the engine
General hints
Attention When starting the engine in con­fined spaces there is a danger of poisoning.
• Before starting, move gear lever to neu·
tral (with automatic gearbox: Selector lever in "P" or"N" position) and apply handbrake fi rmly
•
On vehicles with a manual gearbox de­
press the clutch pedal when operating
starter
so that starter only has to turn en­
gine .
• As soon
as engine starts, release the
ignition key so that starter can dise ngage .
• After starting a co
ld engine It may sound
noisy for a moment or two because the 011 pressure has to build up in the hydraulic
tappets first. This is normal and no cause for
alarm .
~Do not warm engine up by run­~ning it with vehicle stationary. Drive off straight away.
Do not overrev or use full throttle until the
engine has reached the normal operating
temperature .
• On vehicles with a catalytic con­verter the engine must not be started by towing the vehicle in ex· cess of 50 m. Otherwise unburnt fuel can pass into the converter and lead to damage.
• Before trying to start engine by towing, the battery from another ve· hicle should be used for starting if possible -see page 128.
Petrol engines
These engines are equipped with a petrol in­
jection system that automat ically supp lies
the correct fuel/air mixture at all ambient
temperatures.
When engine
is cold or at operating temperature do not accelerate before or
during the starting procedure.
I f the engin e does not start at once, stop
us ing th e starter after 10 secs. wait about
half a m in ute and then try again.
If the engine sti
ll does not start, the electric
fuel pump fuse may have blown -see page
119 .
When the engine
is very hot it may be
neces sary to accelerate slightl y after the
engine has start
ed.
/
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Stopping engine
66 kW engine
Starting a cold engine
Ambient temperature above +5 0C:

The engine can be started without pre­
glow Do not depress throttle during the

starting procedure.

Ambient temperature below +5 0C:

• Turn the key in the ignition lock to posi­
tion 2 (see page 35) -the glow plug warning
lamp comes on It goes out when the igni­
tion temperature is reached (see page 47). While the glow plugs are working do not switch on any other heavy cur­rent consumers because this would place an unnecessary load on the battery.
• When the warning lamp goes out, start
the engine immediately
If the engine does not start, repeat
preglow and try starting it again as described. If the
engine still does not start the fuse for the glow plugs may have blown -see page 120.
Starting a warm engine
The glow plug lamp does not come on -the
engine can be started straight away
When engine has been running fast for a long time, let it idle for about 2 minutes so that it can cool down slightly before being switched off.
Attention After the engine has been stopped the fan can continue running for a while (up to about 10 minutes) with the ignition switched off. It can also start to run again suddenly after a short time if -the coolant temperature in­creases due to heat build-up
-when engine is hot and the en­gine compartment is heated additionally by strong sun­light.
Special care must therefore be taken when working in the en­gine compartment.
On vehicles with a catalytic con­verter, the ignition must not be switched off as long as the vehicle is rolling with a gear engaged, other­wise, unburnt fuel can pass into the catalytic converter and cause dam­age.
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The technical prerequisites
for a low fuel consumpt ion and efficienc y "" ere " built in" at the factory. Particular Im­
p ortance was placed on the lowes t possible
d is turban ce to the enviro nme nt. To retain and make the best possible use of these characteristics attent ion should be paid to the fo llow ing points
~Even those vehicles which do W not have a catalytic converter should be driven on unleaded petrol for the sake of the environment.
~The prescribed maintenance W operations should be carried out exactly as specified in the Service Schedule.
Having your vehicle regularly serviced by a Volkswagen dealer not only ensures that it is always operationally fit, but it also ensures economy, lowest possible burden on the environment and a long service life.
~Check the tyre pressures every 4 W weeks.
Low tyre pressures increase the rolling resistance. This not only increases the fuel consumption and tyre wear, but the handling is also impaired.
~Do not carry unnecessary ballast W in the luggage boot
Particularly in town traffic when one has to accelerate often, weight has a great in­fluence on the fuel consumption. As a
rule ofthumb: For every 100 kg ofweight the consumption increases by approxi­mately litre per 100 km.
~Remove roof rack immediately Wafter use
Particularly at high speeds the increased air resistance makes itself felt consider­ably.
~Electrical consumers should W only be switched on when they are actually required
Heated rear windows, additional driving lights and heater blower consume a con­siderable amount of current. The higher alternator load also increases the fuel consumption. For instance, overa period of 10 hours, the heated rear window will increase the fuel consumption by ap­proximately 1 litre.
~Check the fuel consumption reg­W ularly
The fuel consumption should be checked each time the tank is filled up. By doing this inconsistencies on the vehicle which lead to an increased fuel consumption can be discovered sooner.
• Check the engine oil level each time the tank is filled up The oil consumption depends to a g reat ex­
tent on the engine load and speed. Depend­
ing on the style of driving the consumption
can be as much as 1 .0 litr es/1 000 km .
It
IS no rmal fo r the oil consumption of a ne w
engine to reach its lowest level after a cer­
tain mileage has be en covered . The con­
sumption cannot be properly assessed until
the vehicle has run appro x. 5000 km.
This also applies to the fuel consumption
and the engine output.
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Trouble-free functioning of the ex­haust emission control system is de­
c isi ve for the enviro nment-friendly oper­
ation of the vehicle .
The follow ing points should therefore
be noted:
• Vehicles fitted with a catal ytic con verter
may onl y be driven on unleaded petrol (see
page 82).
• Never drive until the fuel tank
is com­
pletely empty on vehicles with a catal yst.
The irregular fuel supply ca n cause misfir­
ing This allows un burnt fuel into the ex­
haust system. This can cause overheating
and damage to the catalyst.
• If whilst driving, the engine misfires,
loses power and runs unevenly, this could
be due to a fault in the ignition system . In a
case like this, unburnt fuel can enter the ex­
haust system and then escape to atmos­
phere. Furthermore, the catalytic converter
could become damaged due to overheat­
ing The vehicle speed
must be reduced im­
mediately and the defect should be elImIn­
ated at the nearest Volkswagen dealer.
• Do not sw itch
off ignition whilst driving
- see page 38 . •
Do not
overfill engine oil-see page 95.
•
Do not tow start vehicle for more than 50 m -see page 130.
Attention Due to high temperatures which can occur in the catalytic con­verter on petrol engine vehicles in very unfavourable conditions, the vehicle should not be parked so that the catalytic converter can come into contact with in­flammable materials_
Note
Even in the case of a perfectl y working ex­
haust emission control sy stem there can,

under certain engine operating conditions,

be a sulphur-type exhaust smell.

This depends upon the sulphur content
in
the fuel being used.

Quite often this
can be remedied by select­

ing another brand of fuel or, filling up with

unleaded premium petrol.

74

Downloaded from www.Manualslib.com manuals search engine Filling the tank
B1H-040
When tank cap has been taken off it can be
placed on the tank flap -see illustration.
r::ljb As soon as the correctly oper­~ated automatic nozzle switches off for the first time, the tank is full. Do not try then to put more fuel in because the expansion space in tank will be filled -the fuel can then over­flow when it becomes warm.
After filling tank, screw cap on until it clicks
audibly .
The
filler neck
is under a small flap in the
right rear side panel.
With the central locking ' the tank flap is also locked and unlocked automatically. If the central locking system is defective the fiapcanbeopenedbyhand-seene~page.
The tank holds about
-55 Itr (12 gallons) on the Golf saloon
- 60 Itr.
(13 gal lons) on the Golf estate
- 651tr .
(14 gallons) on the Golf syncro
Open
tank flap as shown in left illustr ation.
Note
• Never drive until 1he fuel tank is completely empty on vehicles with a catalytic converter. The irregular fuel supply can cause misfiring, which allows unburnt fuel into the exhaust system. This can cause overheating and damage to the cata­lyst.
• Note any lega l requirements when carry­
ing a spa re fuel canis ter. For safety reasons we do not recommend carrying a spare fuel
canister. In the event of an accident the can­
ister could be damaged and the fuel spilt.
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Vehicles without catalytic
converter
44 and 55 kW engines
un leaded or leaded regular petrol
RON') not lower t han 91
66 kW engine
Unleaded or leaded premium petrol
RON') not lower than 95
85 kW engine
Premium petrol unleaded or leaded
RON') 95
or regular petrol unleaded or l eaded . RON1) 91.
The use of u n leaded regular petrol, with a
m inimum of 91 RON1) leads to a slight loss of power .
Research Octane Num ber , indicate s anti­
knock properties o f the petrol.
Notes
• Unleaded petrol must comp ly with DIN21 51 607 and leaded petrol with DIN 51 600.
• If i n an emergency the octane rating of
the available petrol is lower than that re­quired by the engine only drive with me­
dium engine speeds and low engine load­
ing. High engine loading with full throttle or high revs can cause en­gine dam ag e. Fill tank with petrol of the
correct rating as soon as possible &.., On vehicles with catalytic con­
~verter only unleaded petrol may
be used.
Even a single tank of leaded petrol
will reduce the effectiveness of the
catalytic converter.
In the interests of the environment,
unleaded petrol should always be
preferred to leaded fuel. even on ve­
hicles without a catalytic converter.

21 Stan dards issued by th e G rman Standards inslltu\l on
Petrol additives
The quality of the fuel has a decisive influ­
ence upon the running behaviour, perform­
ance and ser v ice life of the engine. The addi­
ti ves which are mixed into the petrol are of particular sign ificance. One is advised
theref ore only to use good quality pet­rol containing additives.
If such fu el is not available, or if eng ine troubles such as starting difficulties, stall ing during idling, vibratio n and loss of power
occur, the approp riate additives should be mixed with the petro l w hen filling the tank.
These additives have an anti-corrosion ef­
f ect, clean the fuel system and prevent de­
posits building up in the engine.
Petrol additives available
in accessory
outlets have not all shown themsel ves to be effective. Ther efore additives which have been tested for Volkswagen engines are
available from Volkswagen dealers in Ger­many and in many export countries . The Volks wagen dealers are also informed with
r e gard to the use of additives , and they
kno w what to do in cases where deposits have already built up.
83

Downloaded from www.Manualslib.com manuals search engine GENERAL MAINTENANCE

w hen corrosion protected parts are re­ewed.
dih Because when washing the en­~gine petrol, grease and oil de­posits are washed off, the dirty water must be cleaned by an oil sep­arator. For this reason engine wash­ing should only be carried out in a workshop or filling station.
\folkswagen dealers have stocks of the
h igh-quality cleaning and prese rvation ma­
te rials re commended by the factory and
have the equipment ne cessary to appl y them .
Underseal
The under side of the vehicle is coated with a special compound to protect It from cor­
rosion and damage .
H ow ever,
as this protective layer becomes
a m aged when the ve hicle is in use , the
p rotecti ve coating under the body and on
t h e runn ing gear should be examined at de­
fi ned inter vals -prefer ably befo re and after the winter season -and any damage made
g ood. Volksw
agen dealers have stocks of the cor­
rect compound,
have the necessary equip­
ment and are famil iar w ith th e application
proc edure . We advise you ther efore to have
the patching up or additional coating done by a Vol ksw agen dealer.
Note for vehicles with a catalytic
converter
Due to the high temperatures which occur in the afterburning process, additional heat
shi elds are fitted over the catalytic con­
v e rter. Underbodysealant must not
be ap­plied to the se shields, the catal ytic con­
v erter or the exhaust pies. Remo val of the
heat shields is also not permissible .
Cavity preservation
All cavities on the vehicle which could be susceptible to corros ion are given perma­
nent protect ion at the factory.
This coating does not need check i
ng or any
subsequent treatment. Should a small
amount
of wa x run out of the cavities at high
ambient te mperatures it can be re moved
with a plastic scraper and some white spirit.
Note
On no account allow the tail lights to com e
Into contact with dry cleaning solvent.
If the wax which has run out is removed with clean petrol, heed the safety and environmental protection regulations.
89