XTwinTurbo

Still trying to diagnois my miss / hesitation at over 2500 rpm. So far I've swapped out the plugs and coil, rewired my ignition box and sealed up boost leaks.

Next I'm thinking my plug wires may be bad, but they're only about a year old (Taylor 8mm). Anyway I can test for spark arcing or misfiring on one of the cylinders?

Thanks

jfb

Unplug both ends of each plug wire one at a time and measure the resistance. Resistance plug wires are normally 5000 ohms per foot. You may have wires that use a coil of wire as the conductor, if so, the wire resistance would be very low. Look for very high resistance, or an open circuit wire.

James94LT1

Heres a trick that might work for ya. If you have a timing light around hook it to each wire and watch it flash, should be a rythmic flash if you find one that is out of sync examine that wire. I found a burnt wire doing this once when the dealer told me they had no idea what was wrong with my car.

C4DC

Iv'e found bad a bad one by misting the wires with water (from old spray bottle) and running the engine in the dark. If you see little arcing bolts around the wires they are definately bad. But they may not arc at all and still be bad, so take it for what it's worth... :cheers: