Quick Diagnostic Chart [Lf] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Misses
Buck/jerk
Hesitation/stumble
Surges
12 Lack/loss of power
13 Knocking/pinging
14 Poor fuel economy
15 Emission compliance
16 High oil consumption/leakage
Cooling system
17
concerns
Cooling system
18
concerns
19 Exhaust smoke
20 Fuel odor (in engine compartment)
21 Engine noise
22 Vibration concerns (engine)
23 A/C does not work sufficiently.
A/C is always on or A/C compressor runs
24
continuously.
25 A/C is not cut off under WOT conditions.
26 Exhaust sulphur smell
27 Spark plug condition
28 ATX concerns

QUICK DIAGNOSTIC CHART [LF]

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Acceleration/cruise Engine misses during acceleration or cruising.
Acceleration/cruise/ Vehicle bucks/jerks during acceleration, cruising, or
deceleration deceleration.
Momentary pause at beginning of acceleration or
Acceleration
during acceleration
Acceleration/cruise Momentary minor irregularity in engine output
Performance is poor under load.
Acceleration/cruise
(e.g. power down when climbing hills)
Sound is produced when air/fuel mixture is ignited by
Acceleration/cruise something other than spark plug. (e.g. hot spot in
combustion chamber)
Fuel economy is unsatisfactory.
Fails emissions test.
Oil consumption is excessive.
Engine runs at higher than normal
Overheating
temperature/overheats.
Engine does not reach normal operating
Runs cold
temperature.
Blue, black, or white smoke from exhaust system
Gasoline fuel smell or visible leakage
Engine noise from under hood
Vibration from under hood or driveline
A/C compressor magnetic clutch does not engage
when A/C is turned on.
A/C compressor magnetic clutch does not
disengage.
A/C compressor magnetic clutch does not disengage
under WOT.
Rotten egg smell (sulphur) from exhaust
Incorrect spark plug condition
Upshift/downshift/
ATX concerns not related to engine performance
engagement
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