in your garage to make future searches easy.

Condition Value
expand_moreDiesel exhaust gas values
expand_moreCut-off control speed
All other modifications 47004900 rpm
Diesel conditioning gas injections 10
From 60° C engine oil temperature
expand_moreDiesel conditioning speed
All Volkswagen diesel straight-5 2.5 Liters ACV engines 43004700 rpm
From 60° C engine oil temperature
All Volkswagen diesel straight-5 2.5 Liters AUF engines 45004900 rpm
From 60° C engine oil temperature
All Volkswagen diesel straight-5 2.5 Liters AYC engines 45004900 rpm
From 60° C engine oil temperature
All Volkswagen diesel straight-5 2.5 Liters AXG engines 48005000 rpm
From 60° C engine oil temperature
All other modifications 47004900 rpm
From 60° C engine oil temperature
Maximum K-value 2 1/m
expand_moreMeasuring mode
All other modifications A
Measuring sensor 1
Measuring time 0.5 s
Stoppage time 1 s
expand_moreGeneral exhaust gas values
expand_moreDiagnostic socket location
Vehicles manufactured in and before 12.1995 The diagnostic socket is located on
driver's side dashboard behind a
cover.
expand_moreExhaust gas recirculation (EGR)
expand_moreIdling speed with automatic gearbox
2.0 with gasoline straight-4 2.0 L 83 HP engine (1990.7–2003.4) 775825 rpm
All other modifications 800900 rpm
expand_moreIdling speed with manual gearbox
1.9 D with diesel straight-4 1.9 L 60 HP engine (1990.7–1995.12) 820880 rpm
2.4 D with diesel straight-5 2.4 L 76 HP engine (1990.7–1998.4) 800900 rpm
All other modifications 775825 rpm
No adjustment possible
Minimum engine oil temperature at VET 176°F
expand_morePetrol exhaust gas values
expand_moreCO content at idling speed
With regulated catalytic converter 00.5 %
Without catalytic converter 0.51.5 %
All other modifications 00.5 %
expand_moreCO content at increased idling speed
All other modifications 00.3 %
expand_moreDelta lambda
All Volkswagen gasoline straight-4 2.0 Liters AAC engines 0.02 λ
All other modifications 0.03 λ
expand_moreIgnition time
All other modifications -6°00'±1°00' - before TDC + after
TDC
With engine speed 1500 - 1800/min
Increased idling speed 25002800 rpm
Lambda value 0.971.03 λ
expand_moreMaximum HC content at idling
All Volkswagen gasoline straight-4 2.0 Liters AAC engines 100 ppm
All other modifications 200 ppm
expand_morePetrol conditioning speed
All other modifications 25002800 rpm
Petrol conditioning time 120 s
expand_moreSpeed for disturbance variable
All other modifications 675925 rpm

To reduce environment impact and pass government inspections keep emission parameters at the level prescribed by Volkswagen.

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 1991 Volkswagen Transporter Box Van user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.

Before doing any DIY service please check your insurance policy and Volkswagen warranty policy for your region. In some regions DIY service may invalidate your warranty.

Conquer your fears and never give up!

DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Volkswagen Transporter Box Van service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.

Doing basic service for your 1991 Volkswagen Transporter Box Van you're not only saving money, but also also improving your technical skills and learning something new.

1991 Volkswagen Transporter Box Van generations

In 1991 Volkswagen offered 2 generations of the Transporter Box Van. Emission may vary in different generations. Be sure that you are looking at the rigt modification.

Units:
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