Mazda MX-5 Miata Sport 2007, Manual

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NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [LF]
POSSIBLE CAUSE & DESCRIPTION (LACK/LOSS OF POWER-ACCELERATION/CRUISE)

EGR valve (mechanical
stuck)

Engine mounts

Check valve (two-way)
No Inspect for cause.
20

Verify test results.

If normal, return to diagnostic index to service any additional
symptoms.
(See ENGINE SYMPTOM TROUBLESHOOTING [LF] .)

If malfunction remains, inspect related Service Bulletins and/or On-
line Repair Information and perform repair or diagnosis.

If vehicle is repaired, troubleshooting completed.

If vehicle is not repaired or additional diagnostic information
is not available, replace the PCM.
(See PCM REMOVAL/INSTALLATION [LF] .)
12
LACK/LOSS OF POWER-
ACCELERATION/CRUISE
DESCRIPTION Performance is poor under load (such as power
down when climbing hills).

Improper A/C system operation

Erratic signal or no signal from CMP sensor

Air leakage from intake-air system parts

Restriction in intake-air system

Intake air temperature too hot

Improper variable intake air control operation

Improper operation of electronic throttle
control system

Purge control solenoid malfunction

Improper EGR valve operation

Brake dragging

Erratic signal from CKP sensor

Low engine compression

Vacuum leakage
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
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