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]

Have you licked that 9v battery lately? You sure it's good?

my thoughts exactly.

We have similar "valves" in my business.
Our systems usually "Hit" the valve with full bus voltage (in the case of our cars that is ~13 Volts running), to open it.
Then the voltage drops to just a few volts to hold it open for extended periods.

I would not be surprised if these systems hit the injector with 12V at the start of the "fire" then backed it down to 3V for the duration.

I cannot see any captured waveforms of our injector pulses with an oscope online to be sure.

The rated coil resistance of these is 2-3 Ohms so "hitting" them with 12V from a reputable "source" :-) for a "touch test" should not hurt them. ("touch" meaning long enough to see the spark and no more)

I would try a nice stiff12V battery and a quick "touch" to see if you can free them after a good soaking.

Stu

[worn]

Have you licked that 9v battery lately? You sure it's good?

my thoughts exactly.

We have similar "valves" in my business.
Our systems usually "Hit" the valve with full bus voltage (in the case of our cars that is ~13 Volts running), to open it.
Then the voltage drops to just a few volts to hold it open for extended periods.

I would not be surprised if these systems hit the injector with 12V at the start of the "fire" then backed it down to 3V for the duration.

I cannot see any captured waveforms of our injector pulses with an oscope online to be sure.

The rated coil resistance of these is 2-3 Ohms so "hitting" them with 12V from a reputable "source" :-) for a "touch test" should not hurt them. ("touch" meaning long enough to see the spark and no more)

I would try a nice stiff12V battery and a quick "touch" to see if you can free them after a good soaking.

Stu

Stu, you are really missing out then. Check this out.
http://members.rennlist.com/pbanders/DJetParts.htm

Diagrams and oscilloscope traces galore.

Mr. Anders has done a tremendous service in helping us understand these things. (IMG:style_emoticons/default/pray.gif)