Mazda MX-5 Miata Sport 2007 Manual page 2002

2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
POSSIBLE CAUSE
Poor fuel quality

Erratic signal to ignition coil

Engine overheating

Throttle body malfunction

Spark plug malfunction

PCV valve malfunction

Improper valve timing due to jumping out of

timing belt
Improper variable valve timing control

operation
Restriction in exhaust system

Intermittent open or short in fuel pump related

circuit
Inadequate fuel pressure

Fuel pump mechanical malfunction

Fuel line restriction or clogging

Fuel leakage from fuel injector

Fuel injector clogging

Erratic signal from accelerator pedal position

sensor
Erratic signal from TP sensor

Intermittent open or short circuit in MAF

sensor, Accelerator pedal position sensor, TP
sensor, IAT sensor and VSS
AT malfunction (AT)

Clutch slippage (MT)

WARNING:
The following DIAGNOSTIC PROCEDURE
TABLE contains the fuel system diagnosis
and repair procedures. Read the following
warnings before servicing the fuel system:
Fuel vapor is hazardous. It can easily

ignite, causing serious injury and
damage. Always keep sparks and
flames away from fuel.
Fuel line spills and leakage are

dangerous. Fuel can ignite and cause
serious injuries or death and
damage. Fuel can also irritate skin
and eyes. To prevent this, always