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

[reharvey]

These operate at 3 volts. I use a DC model train transformer. Use a multimeter to set it at 3 volts and you're ready to go. Ray

[toadman]

They do operate at 3V but, in the past I have tested injectors with a 9V battery and if they click I consider them good, electrically.

[lsintampa]

OK,

So there is NO click under power.

They ohm out at about 2.5 ohm (which I think is OK).

The pintles do not budge.

I can only assume that they may be OK (ohm test), but stuck - pintle not able to move.

I'll soak them in PB blaster - and see it they'll loosen up?

[Mark Henry]

If the pintle won't budge after the soaking (i've used diesel, injector cleaner, etc.) try ultrasonic, then if still stuck they're junk.
That said I've had good luck soaking them.

[r_towle]

Dude, you have three threads going for the same problem.
What are you soaking them in?
Are you submersing them all the way to ensure the cleaner gets into both sides....in the tip is useless, it's closed.
You need to dunk them overnight.
Wiggle them around to get the air out and the cleaner in.

Rich

[Porsche930dude]

try some different test leads and a different battery. Im guessing there is a reason that plug isnt on the car anymore.

[lsintampa]

Dude, you have three threads going for the same problem.
What are you soaking them in?
Are you submersing them all the way to ensure the cleaner gets into both sides....in the tip is useless, it's closed.
You need to dunk them overnight.
Wiggle them around to get the air out and the cleaner in.

Rich

Got them submersed in Textron cleaner... will test again tomorrow.

[lsintampa]

Soaked overnight - no change.

I spoke with the PO again about the injectors.

They were pulled out of a car that sat for years and sent for testing / cleaning. The shop did say they needed some work, but they got them cleaned up and spraying well.

That was about six months ago. Since that time they sat in a plastic baggie until I put them into the car.

I didn't think I needed to test them, as I knew they were supposed to be fine.

Anyway, they don't click, the pintle doesn't move, I can't move anything through them at all under pressure - in or out. (not sure if that can even be done anyway?)

I can keep soaking them, but they have been soaking for over 12 hours now.

It is sort of hard for me to believe they were OK and now are not OK, even for sitting for a while. I would think that the Textron bathing would have freed at least ONE of them up.

Very frustrating.

[JeffBowlsby]

I have seen this before. The injectors must be installed and put into service right away or they can freeze-up again. No worries, just get them recleaned, they should work again. If you have paperwork for the shop that did them before, they may be willing to redo them at no charge.

[speed metal army]

Is the pigtail you made any good? Just a thought...

[lsintampa]

Is the pigtail you made any good? Just a thought...

Thanks, but I'm sure they are fine. When I tap the two ends to power, I get spark, so I'm fairly sure the wires are OK - otherwise, I wouldn't get anything.

I've also tried alligator clips - same result.

Haven't tried just plain old wire but something tells me the results will be the same.

[lsintampa]

OK,

Another question that I don't have an answer for:

Let's assume that whatever the "electrical component" inside this thing is toast - as in these injectors will never click again.

That said, shouldn't the pintle (the small needle that comes out the bottom) move by pushing it with something blunt and soft?

[SLITS]

The electrical component inside is a solenoid. It probably pulls the pintle up, inside the body to allow fuel to flow based on the diagram I have seen. That said, the movement would be miniscule.

[lsintampa]

The electrical component inside is a solenoid. It probably pulls the pintle up, inside the body to allow fuel to flow based on the diagram I have seen. That said, the movement would be miniscule.

So there would be no way to feel or see this movement if it is that little.

I read that the ohm readings (to test the solenoid) should under 3 omhs... I get like 2.5 ohms for all four injectors.

So can I assume then that the solenoids are OK and I'm just dealing with a really stubborn set of stuck injectors?

Still makes me wonder when they were cleaned six months ago what was used to store them. I'm beginning to think it may have been JB weld or something.

Makes no sense.

[JeffBowlsby]

You can hear a click when activated. Seems to me it can be felt too, when the pintle moveds

[lsintampa]

You can hear a click when activated. Seems to me it can be felt too, when the pintle moveds

Jeff, I'm not hearing or feeling anything.

I put two 1.5 volt batteries in line to get to 3 volts. When I apply this power to any injector, the only noise I hear is the spark created when I tap the power source. There is NO clicking in the injector at all.

I've seen videos of injectors being tested, so I'm sure that if I heard one click, I'd realize what it was. Just not happening.

So are the OHM readings meaningful or am I just wasting my time trying to figure the electrical side out?

I can deal with them being "stuck" so to speak, but if they are no good electrically, that's another game.

Thanks,

Len

[JeffBowlsby]

You can hear a click when activated. Seems to me it can be felt too, when the pintle moveds

Jeff, I'm not hearing or feeling anything.

I put two 1.5 volt batteries in line to get to 3 volts. When I apply this power to any injector, the only noise I hear is the spark created when I tap the power source. There is NO clicking in the injector at all.

I've seen videos of injectors being tested, so I'm sure that if I heard one click, I'd realize what it was. Just not happening.

So are the OHM readings meaningful or am I just wasting my time trying to figure the electrical side out?

I can deal with them being "stuck" so to speak, but if they are no good electrically, that's another game.

Thanks,

Len

Seems to me I have specs somewhere that show them to have 2.7 ohms, so yours are good electrically. They are just stuck. Send 'em in to get them unstuck.

[timothy_nd28]

Consider reading this thread, he went thru the same exact problem you are having now. stuck fuel injectors

[r_towle]

did you soak them?
If so, what did you soak them in and for how long?

Did you soak just the tips or did you submerse them completely?

Rich