my car wont start so I pulled a spark plug out and all of my wires from the valve cover but I left them plugged into the coil. I put a plug in the 1st wire and it fired. I moved it over to the second, no firing, then to the third and forth and no fire. I dont know if this is a respectable way of testing spark but if it is, I only am firing in one plug. I never had problems starting it until one day it just stopped. It was misfiring every once and a while during idle and when I got on it. Could this be my cam position sensor? The weird thing is whenever it wouldn't fire at first, I bypassed my msd ignition and it fired right up, but then it wouldn't start again after that one time. Im about to fork out $37 on a cam angle sensor tomorrow so any help asap will be greatly appreciated!
#62947, "RE: only one spark plug is firing" In response to Reply # 0
did you have your plugs grounded on your valve cover? you gotta have your plugs grounded. that might be obvious but i figured i'd say it anyways. cylinders 1 and 4 are companion cylinders as well as 2 and 3 so if you're firing on 1 then you *should* be firing on 4. cam position sensor or crank position sensor are possibilities but if you've been having trouble with your ignition, then i think it's pretty safe to say its something with your msd, maybe a loose wire or something. good luc