Injector Click Test (outside of motor) Options

[lsintampa]

OK,

I hooked up a pig-tail to this injector. Then I got a 9V battery and tapped the pig-tail numerous times.

I never hear the injector click - and I'm assuming that it should.

The pig-tail does spark though - as if there is a short - which seems odd.

So, what is that telling me?

BTW - PO has said that all the injectors were cleaned and tested and all tested and sprayed well. They were however sitting in a baggy for three months. I can't imagine that they just went south????

All four injectors and the cold start valve all behave the same way.

Thanks,

Len

[stugray]

Valy,

Thanks for the scope capture.
It sure looks like a full 12-13 volts at the injector.
I couldnt figure out the rate...

Every 13ms (period) is ~77 Hz yet the description was high revs....
I dont understand the injector timing for these.

You can even see the injector valve (pintle?) response time at ~2ms.
It would be cool to have a current trace to go along with that voltage trace.

However based on that Voltage trace, the injectors use 12V when running.

Stu

[Valy]

Valy,

Thanks for the scope capture.
It sure looks like a full 12-13 volts at the injector.
I couldnt figure out the rate...

Every 13ms (period) is ~77 Hz yet the description was high revs....
I dont understand the injector timing for these.

You can even see the injector valve (pintle?) response time at ~2ms.
It would be cool to have a current trace to go along with that voltage trace.

However based on that Voltage trace, the injectors use 12V when running.

Stu

77 revolutions/second = 77*60 revolutions/minute=4620 RPM