Info

No.

Description

Special Tool

Remarks

1

Oil temperature tester

9122

2

Testing sensor

9122/1

3

Exhaust gas test line

US 8023

or SUN 120-239

Printed in Germany - ||r 1983

Making Idle Adjustments. USA

24-7

ADJUSTING IDLE SPEED/CO - USA Note

Adjusting Requirements: Engine must be in perfect running condition.

1. Connect exhaust gas test line US 8023 or SUN 120 — 239 on test connection of catalytic converter.

Since 1984 Models

2. Connect CO tester according to manufacturer's instructions.

3. Connect oil temperature tester 9122. Adjust test sensor to length of oil dipstick.

4. Run engine to operating temperature (oil tern-perature approx. 80° C/1760 F).

5. Turn regulating screw or bypass screw on throttle housing until specified speed is reached. Use separate tachometer from tester or similar.

Note

Fan motor and a/c compressor must be switched off during adjustments.

Make adjustments as quickly as possible to prevent intake ports from becoming too hot, to avoid false CO reading.

6. Pull off rubber cap on plug for oxygen sensor and detach plug.

7. Check CO level. If CO level is not the specified value, correct the setting on the air flow sensor.

8. Connect plug for oxygen sensor again after finishing adjustments.

9. Coat threads of cap nut for test connection on catalytic converter with Bosch VS 140 16 Ft or Optimoly HT grease. Torque specification: 30 Nm (22 ft lb).

Printed in Germany . 11) /1983

Adjusting Idle Speed/CO - USA 24 - 9

CORRECTING CO SETTING ON AIR FLOW SENSOR - USA

Note

If CO level is not as specified, remove plug from bore providing access to the mixture regulating screw after removing the air flow sensor.

Removing

1. Remove air flow sensor.

2. Drill hole in plug with a 2 mm dia. drill (against steel insert).

3. Pull out plug with a left-hand twist drill (No. 2).

3. Install a new plug in bore providing access to mixture regulating screw after finishing adjustments. Press plug in flush.

Installing

1. Install air flow sensor.

Note

Never reuse drilled plugs!

2. Adjust idle speed and correct CO level.

Turn mixture regulating screw accordingly with a screwdriver.

Turning clockwise = richer mixture

REMOVING AND INSTALLING FUEL INJECTORS

No.

Description

Qty.

Note When Removing Installing

Special Instructions

1

Fuel distribution tube

4

2

Retaining clamp

4

Check for correct fit in groove

3

Fuel injector

4

Electric connection faces down

4

Seal

4

Replace

5

Protective sleeve

4

Replace, press on and be careful not to damage injector needle

^ Seal \

4

Replace

J

^ Washer^J

4

INSTALLING FUEL INJECTORS

1. Coat bottom seal with a silicone grease, e. g. Bosch Ft 2 v 2 and press fuel injectors into bores of intake manifold separately.

2. Then push fuel distributor pipe on fuel injectors and mount retaining clamps.

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