testing for spark

[Dy_]

just wondering...how do i test my leads for spark?

[dsp26]

pull out a lead and connect a sparkplug.. rest it on the head though and make sure electrode is not near anything.

remove the fuel pump fuse and crank.

***EDIT***
why test leads? i've never seen even a really old high ohm lead unable to spark unless the plug connection inside was severed...

[Dy_]

my mates car died last night and roadside assist. came he did something before i was looking and told me there wasnt any spark. So i thought i'd find out how to do it just to learn something new.
I watched and learnt how to test the injectors to see if theres power and if it pulses.

[dsp26]

lol. the exact method i posted was the exact thing i also watched from roadside assist ages ago when my coil died and i didn't know anything about the ignition.

[Dy_]

lol yeah the coil pack died.

[Dy_]

any other way of testing?

[tiksie]

take a lead off one by one, if one of the leads/sparkplugs shat themselves, the car would be running on 1 less cylinder, say you got 6 leads (V6 obviously) and one of them carked it, you pull off 1 injector at a time and see which one doesn't make the car stutter, and then you go accordingly to which plug sparks that cylinder so then the problem will lie with the spark plug,lead or the coil pack...If the car is stuttering, its most probably a carked spark plug, if not then the lead, if not then the coil pack..Always go cheapest option first as coil packs aren't that cheap..If you think the problem lies with the injector then replace that as its cheaper then a coil pack.

hope that helps.