g741.org

Anyone know of a way to check if plug wires are good or bad ?

Thanks, Carl
Terra Alta WV

start it cold, and as it idles and warms up, feel the plugs with your hand to make sure they're all warming up at the same rate. if you have a plug that warms up slow or stays cold, you've either got a compression issue or spark issue on that cylinder.

cweber2,

There's another besides what Isaac mentions. If you have a multimeter you can measure resistance directly. If your meter doesn't autorange then set it for Killi-Ohms scale. Without knowing what the value should be you need to compare your wires to a known good wire, whether that's one of the wires in your set or a new wire. Just remember that one wire in the set for the M37 is longer, so it should have a higher resistance. You can calculate the values per foot (inches/12) to make sure the longer wire has the same resistance per foot as the 5 shorter wires.

The old "slide the grounded screwdriver down the wire" trick won't work if the wire is shorting to the shielding, nor will the spray bottle trick.

regards,
bob

thanks !!