Porsche 944 User Manual download pdf (Page 122)

Air Flow Controlled Fuel Injection 944

Checking idle speed and CO

without catalytic converter

Model 87 onward

Engine type M 44.40/41 (3.0 l)

Note

It is no longer possible to adjust the idle

speed. The throttle valve connector

adjustment therefore no longer applies.

Idle/CO adjustment

Adjustment preconditions

Engine in perfect mechanical conditions.

Consumers must be switched off during

adjustment work. Carry out adjustment as

quickly as possible to ensure that the intake

paths do not heat up thus falsifying the CO

value. Ambient temperature 15 - 35° C.

Warm engine up to operating

temperature.

(70 - 90°C oii temperature). Use oil

tempe-

rature tester, Special Tools 9122 and

9122/2.

Check CO value. If the CO value is not

within the prescribed tolerances. correct

the setting at the air-flow sensor. Remove

the sealing plug in the access bore to

the CO adjusting screw.

Engine type M 44.40

Standard screwdriver for 3 mm Allen screw.

Engine type M 44.41 (3.0 l)

Standard angled screwdriver for 5 mm

Allen screw.

Illustration shows engine type M 44.40

86/512

CO setting: 0.5...1.5 %

Turn to the right - richer mixture

Turn to the left - leaner mixture

Checking idle speed.

Connect separate speedometer

according

to manufacturer's specifications.

Idle speed 840 +- 40 rpm

24 - 106

Checking idle speed and CO- with catalytic converte

Printed in Germany - XIX, 1989

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 166 167

Comments to this Manuals

No comments

Porsche 944 User Manual Page 122

Comments to this Manuals