spark plugs AUDI A6 1997 C5 / 2.G AHA Engine Motronic Ignition System Workshop Manual
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Motronic ignition system Technical data, spark plugs
Engine code
AHA
Engine idle RPM
Idle RPM cannot be adjusted, is corrected by Idle Air Control (IAC) 620 - 740 RPM
(all-wheel drive)
740 - 860 RPM
(front-wheel drive)
RPM limit
Operates by shutting off fuel injectors approx. 6500 RPM
Ignition timing
Ignition timing cannot be adjusted; it is determined by the Engine Control Module (ECM)
Firing order 1-4-3-6-2-5
Spark plugs Tightening torque 30 Nm (22 ft lb)
Part No. 1) 101 000 035 HJ (NGK)
Manufacturer's code
(if applicable) BKR 6 EKUB (NGK)
Electrode gap - mm 1.6 mm
Maintenance interval Owner's Manual
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Checking
- Check DTC memory page 01
-16
.
There must be no malfunctions stored
- If DTC memory is not clear (malfunctions
recognized):
- Make necessary repairs and erase DTC
memory.
- Stop engine and start engine again.
- Road test.
- Check and erase DTC memory again.
- By briefly disconnecting fuel injector connectors
with engine running, check which cylinder is
misfiring, or not firing at all.
A misfiring cylinder can also be isolated by
examining the spark plugs (for a carbon-fouled
plug).
-
Interchange spark plug with one from cylinder
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Checking ignition coils -N-, -N128- and -N158-
- Disconnect 5-pin connector from ignition coil
assembly.
- Remove ignition wires from spark plugs.
If resistance is NOT OK: - Using multimeter and adapters from VAG1594 connector test kit,
measure resistance between both spark plug connectors of respective
ignition circuit (across coil).
Specification: approx. 18-25 k .- Remove ignition wires from ignition coils and measure resistance
between ends of respective ignition wires.
Specification: approx. 4.0-6.0 k
Pa
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gnition s
ystem
11/23/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.28.1