Question about 2004 Honda Accord
Can I use regular compressed air rather than nitrogen for leak testing on my automobile air conditioning system? I do plan on running a vacuum for 30 minutes after the leak testing.
Pulling a vacuum is fine. No need for nitrogen. If vacuum holds for a few minutes after you shut down pump and close it off to system. You should be good to go. BEFORE YOU PUT NEW REFRIGERANT IN DOUBLE CHECK THE SCHRATER VALVES ON THE HIGH AND LOW SIDE PORTS. THEY ARE NOTORIOUS FOR CAUSING LEAKAGE BECAUSE WE WILL NOT HEAR OR SEE THEM LEAK UNTIL AFTER WE REMOVE THE MANIFOLD GAUGES FROM THE SYSTEM
Posted on May 25, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
Throttle body tampering, excessive deposits, or damage. Refer to Fuel System Description .
Restricted air intake system
Large vacuum leak
Inspect the air intake ducts for being collapsed, damaged areas, looseness, improper installation, or leaking especially between the mass air flow (MAF) sensor and the throttle body.
Inspect crankcase ventilation valve for proper operation.
Inspect the throttle position (TP) sensor and related wiring. Refer to DTC P0123 .
Monitor the 24X crank sensor and the CMP sensor present parameters on the scan tool. If both are not responding, test the sensor feed circuit. Both sensors use a separate feed circuit but are internally connected to power. Test all CKP sensor A and CMP sensor circuits for intermittents. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Monitor the 3X parameter on the scan tool. If the 3X is not responding, inspect the CKP sensor B and circuits for intermittents. Inspect the ignition control (IC) circuit, IC timing control circuit, low resolution engine speed signal circuit and the low reference circuit for intermittents. If these circuits become open, or shorted may not set a DTC immediately, but are capable of causing driveability complaints. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Test the exhaust gas recirculation (EGR) system for proper operation. Refer to Exhaust Gas Recirculation (EGR) System Description .
Inspect the transaxle range switch input with the vehicle in drive and the gear selector in drive or overdrive.
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