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Can I swap spark plug wire 2 and 4?
Posted 30 December 2004 - 07:05 PM
Subaru service manual seems to indicate that 1/3 and 2/4 have same resistance. Looking at spark plug wires 1/3 seem like same wire (label says 1-3) but 2 and 4 seem different (labeled 2 and 4 respectively).
Can I swap them just for test? If not, is there a simple test short of buying new wires.
Posted 30 December 2004 - 07:24 PM
Posted 02 January 2005 - 02:47 AM
I tried it - seems like perfectly acceptable method.
Cylinder 2 misfire didn't move to cylinder 4, so I know it it'sn't the wires.
Cylinder 2 misfire however seems to have vanished mysteriously.
See http://www.ultimates...ead.php?t=27635 if you have any interest!
Posted 03 January 2005 - 01:03 PM
Same applies for overheating - I suspect I ended up doing head gasket job because I diagnosed the problem to thermostat, it was probably a clogged radiator. Repeated overheating lead to blown head gasket.
Here are a few things to try when one gets a CEL with cylinder misfire:
1. Swap spark plugs/spark plug wires/injector to see if the problem moves to another cylinder - if it does, you know what exactly to replace!
2. Measure the resistance of ignition coil/spark plug wires, injector connector against specs, before assuming they are bad
3. Listen to click-click of injectors to see if they are working okay.
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