[V6-12v] Re: how do you test for spark?

[Tom Christiansen]

Kent,

>Clive Young wrote:
>>1.    disconnect the input to the solid state out put stage and measure each
>>signal coming from the ecu with a scope.... okay a meter if you have one, it
>>would be a fast signal but you MAY see a flicker on your meter, if all three
>>are the same fair enough, if one is different it might tell you something.
>
>Hmm, that sounds doable.  But I'm afraid my digital Voltmeter won't
>be fast enough to get a reading.

You should get some average or RMS value of the signal. I don't know the 
output voltages of the ECU, but I suspect e
either 5V or 12V. You should see something in between. It should be the 
same voltage on all outputs.

>I cracked the fuel line to the rail.  It pumped about 1/2 pint
>of gas in about 5 seconds of cranking.  Pressure or volume
>may still be an issue, but even so, I would expect the car to
>start; it may run run poorly or die quickly, but I would expect
>it to start.

Unless the injectors aren't firing. Check the signal to them.

Tom