1. Verify that the ignition timing (M-MDS: SPARKADV PID) is within the specification using M-MDS or
equivalent.
Ignition timing
Approx. BTDC 8°
2. Verify that ignition timing advances when the engine speed increases gradually.
If there is malfunction, refer to "
ENGINE SYMPTOM TROUBLESHOOTING [LF]
".
IDLE SPEED INSPECTION
1. Verify that the idle speed (M-MDS: RPM PID) is within the specification using M-MDS or equivalent.
If there is malfunction, refer to "
ENGINE SYMPTOM TROUBLESHOOTING [LF]
".
Idle speed
No load: 670-770 rpm (MT), 700-800 rpm (AT)
Electrical loads (38-48 A): 700-800 rpm
Electrical loads (more than 48 A): 800-900 rpm
P/S ON: 700-800 rpm (MT), 750-850 rpm (AT)
A/C ON: 825-925 rpm (MT), 775-875 rpm (AT)
IDLE MIXTURE INSPECTION
1. Verify that the idle speed and ignition timing are within the specification. (See
IDLE SPEED
INSPECTION
.) (See
IGNITION TIMING INSPECTION
.)
2. Insert an exhaust gas analyzer to the tailpipe.
3. Verify that the CO and HC concentrations are within the regulation.
If there is malfunction, refer to "
ENGINE SYMPTOM TROUBLESHOOTING [LF]
".
Idle mixture
HC concentration: Within the regulation
CO concentration: Within the regulation
NOTE:
Idle speed is not adjustable.
Idle speed verification requires M-MDS or equivalent.
2007 Mazda MX-5 Miata Sport
2007 ENGINE Mechanical - MX-5
Microsoft
Thursday, July 09, 2009 3:21:51 PM
Page 88
© 2005 Mitchell Repair Information Company, LLC.