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k20z1 Compression Test

Old 03-29-2011, 10:14 AM
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Default k20z1 Compression Test

Hey guys, quick question ive done numerous compression tests on different cars. I was looking in the helms and the procedure for disabling fuel is different on the 05 and 06 than previous years. Here is exactly what it says:

Engine Compression Inspection
NOTE: On the 2005-2006 models: After this inspection,
you must reset the engine control module (ECM)/
powertrain control module (PCM), otherwise ECM/PCM
will continue to stop the injectors from functioning.
Select ECM/PCM reset using the Honda Diagnostic
System (HDS) (see page 11-4).

2002-2004 models: Remove the No. 17 (15 A) fuse
from the under-dash fuse/relay box.
2005-2006 models: Connect the HDS to the data link
connector (DLC) (see step 2 on page 11-3). Turn the
ignition switch ON (II), then select PGM-FI,
INSPECTION, then All INJECTORS OFF function on
the HDS.


ECM/PCM reset
This command clears stored specific data from each
vehicle such as DTCs, freeze data, and readiness codes.
It does not clear CKP PATTERN data.
1. Reset the ECM/PCM with the HDS while the engine
is stopped.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II).Wait 30 seconds.
4. Turn the ignition switch OFF, and disconnect the
HDS from the DLC.
5. Do the ECM/PCM idle learn procedure (see page
11-349).

ECM Learn Procedure
1. Make sure all electrical items (A/C, audio, rear
window defogger, lights, etc.) are off.
2. Reset the ECM/PCM with the HDS.
3. Turn the ignition switch ON (II), and wait 2 seconds.
4. Start the engine. Hold the engine speed at
3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, or until the engine coolant
temperature reaches 194 °F (90 °C).
5. Let the engine idle for about 5 minutes with the
throttle fully closed.
NOTE: If the radiator fan comes on, do not include
its running time in the 5 minutes.



Is all of this necessary ? Could I just disconnect the ignition coils and remove the connector from the injectors, do the test and put back together ? Or is it not that simple now ?
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