idle control BMW 3 SERIES 1991 E30 User Guide

BMW 3 SERIES 1991 E30 User Guide 3 SERIES 1991 E30 BMW BMW https://www.carmanualsonline.info/img/1/2759/w960_2759-0.png BMW 3 SERIES 1991 E30 User Guide

Page 109 of 228

BMW 3 SERIES 1991 E30 User Guide Fuel injection system - fault finding
L-Jetronic fuel injection system
Engine difficult to start, or fails to start (when cold)
Probable cause Corrective action
Cold start injector or thermotime switc

Page 110 of 228

BMW 3 SERIES 1991 E30 User Guide Engine difficult to start, or fails to start (when cold)
Probable cause Corrective action
Cold start injector or thermotime switch
faulty (early Motronic system only) Test cold start injector and ther

Page 114 of 228

BMW 3 SERIES 1991 E30 User Guide 7 Ignition timing (TCI system)-
check and adjustment
4
Warning: Keep hands, equipment
and wires well clear of the
viscous cooling fan during
adjustment of the ignition timing.
Note:This Section descri

Page 125 of 228

BMW 3 SERIES 1991 E30 User Guide Check
12Warm up the engine, and let it run at idle.
Disconnect the oxygen sensor electrical
connector, and connect the positive probe of
a voltmeter to the oxygen sensor output
connector terminal (ref

Page 126 of 228

BMW 3 SERIES 1991 E30 User Guide slightly by hand. Release the throttle slowly
until it reaches 0.2 to 0.6 mm from the throttle
stop. There should be continuity.
29Check the resistance between terminals 3
and 18 as the throttle is op

Page 128 of 228

BMW 3 SERIES 1991 E30 User Guide On some models, it will be necessary to
release the retaining clip (see illustration).
13Visually examine the canister for leakage
or damage.
14Renew the canister if you find evidence of
damage or lea

Page 137 of 228

BMW 3 SERIES 1991 E30 User Guide friction surfaces of the brake shoes or 
drums.
12Make sure the adjuster assembly is
properly engaged with its respective notch in
the handbrake lever.
13When refitting the automatic adjustment
mechan

Page 212 of 228

BMW 3 SERIES 1991 E30 User Guide REF•11
REF
Fault Finding
Engine misses at idle speed
m mSpark plugs worn or incorrectly-gapped (Chapter 1).
m mFaulty spark plug HT leads (Chapter 1).
m mVacuum leaks (Chapter 1).
m mIncorrect ignit

Page 226 of 228

BMW 3 SERIES 1991 E30 User Guide REF•26Index
E
Earth check - 12•2
Electric fan - 3•4
Electric shock - 0•5
Electric windows - 12•9
Electrical equipment  - REF•2
Electrical system fault finding - 12•1
Electronic control s
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