Mazda MX-5 Miata Sport 2007 Manual page 2026

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
DIAGNOSTIC PROCEDURE
EXHAUST SMOKE DIAGNOSTIC PROCEDURE TABLE
STEP
1 What color is smoke
coming from the
exhaust system?
2 Remove and shake the
PCV valve.
Does the PCV valve
rattle?
3 Does the cooling
system hold pressure?
4 Inspect for the
following:
2007 Mazda MX-5 Miata Sport
INSPECTION
Air cleaner

restriction
sure that it is free of foreign material.
RESULTS
Blue Burning oil is indicated.
Go to the next step.
White Water in combustion is indicated.
Go to Step 3.
Black Rich fuel mixture is indicated.
Go to Step 4.
Yes Inspect for the following:
Damaged valve guide, stems or

valve seals
Blocked oil drain passage in

cylinder head
Piston ring is not seated, seized

or worn.
Damaged cylinder bore

If other driveability symptoms are
present, return to diagnostic index to
service any additional symptoms.
No Replace the PCV valve.
Yes Inspect for the following:
Cylinder head gasket leakage

Intake manifold gasket leakage

Cracked or porous engine block

If other driveability symptoms are
present, return to diagnostic index to
service any additional symptoms.
No Inspect for cause.
Yes Go to the next step.
ACTION