POSSIBLE CAUSE
No signal from CKP sensor due to sensor,
related wire or wrong installation
Vacuum leakage
Engine overheating
Low engine compression
Erratic signal to ignition coil
Poor fuel quality
PCV valve malfunction
Air cleaner restriction
Restriction in exhaust system
Electrical connector disconnection
Open or short circuit in fuel pump body and
related wiring harness
No battery power supply to PCM or poor
GND
Inadequate fuel pressure
Fuel pump body mechanical malfunction
Fuel leakage from fuel injector
Fuel injector clogging
Ignition coil malfunction
Improper air/fuel mixture ratio control
Improper valve timing
Improper operation variable valve timing
control system
Immobilizer system and/or circuit
malfunction
Immobilizer system operating property.
(Ignition key is not registered.)
Pressure regulator malfunction (built-in fuel
pump unit)
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.
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:09 PM
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