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Guest Message by DevFuse

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Can I swap spark plug wire 2 and 4?

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6 replies to this topic

#1 bearbalu


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Posted 30 December 2004 - 07:05 PM

I am getting cylinder 2 misfire.

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.

#2 cookie


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Posted 30 December 2004 - 07:24 PM

do when you don't have spares. If the skipping cyl changes you've hit paydirt.

#3 Nug


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Posted 30 December 2004 - 08:04 PM

Perfectly acceptable method.

#4 bearbalu


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Posted 02 January 2005 - 02:47 AM

Thanks folks.

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!

#5 cookie


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Posted 02 January 2005 - 02:33 PM

Good luck Bear.

#6 northguy


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Posted 02 January 2005 - 03:38 PM

Best fix of all - one that costs nothing!

#7 bearbalu


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Posted 03 January 2005 - 01:03 PM

One thing I have learn from reading on this forum is that blind "replace and pray" usually leads to expensive repairs, specially CEL.

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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