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sporting6969
New User
Jun 1, 2008, 12:10 PM
Post #1 of 2
(2996 views)
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i have a 97 kia sportage with 110k #1and 2 cylinder have injector pulse if i disconnect inj. connector i have power to one wire and neg pulse to the other wire when i connect test light across terminals it pulses a few times and then i just have power going in and coming out i changed the ecm same problem checked wiring from ecm to inj. ok
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DanD
Veteran
/ Moderator
Jun 2, 2008, 1:44 PM
Post #2 of 2
(2980 views)
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Re: 97 kia sportage
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If you are testing for injector pulse; you shouldn’t be using a standard test light.
A regular test light will allow to much current flow and it could cause damage to the computer.
You should use a powered test light or a noid light; these lights take very little amperage to light the light.
I’m not sure (likely not) whether Kia’s computers have some form of overload protection for the injector circuit but they might? Something like a circuit breaker that kicks out when hot and then comes back on line when cooled. Or you’ve just been lucky not to permanently damage the computer?
Have you tested the resistance values of the injectors? The spec calls for a range of 13.5 to 14.1 Ohms.
A regular test light is approx 1 or 3 Ohms; the lower the resistance (Ohms) the higher the current flow; high current flow, equals higher heat.
So if a couple of the injector only have 5 or 6 Ohms they could be the cause for the driver circuit (ground) to stay/go open.
When you say that there is power going in and coming out; do you mean with the injector plugged into the harness?
If so, that’s normal, if there is no path to ground.
I’ll try and explain; power is supplied to one side of the injector, via a relay not the computer. the power goes through the injector’s coil winding and out the other side. If there’s no path to ground (pulse), the power isn’t used up at the injector and will light the test light.
If you where to supply your own ground with a jumper wire to the ground side of the injector you would see the test light go out. If you’re going to try this, don’t leave the ground wire connected, just a quick touch to confirm that the light goes out. Injectors are only meant to be on for a couple of mili-seconds at a time.
But if you mean you have power on both injector plug terminals with the connector disconnected, that isn’t normal; there should never be power on the ground (pulse) side of the connector.
If this is the case, disconnect the computer from the harness. If the power is gone, then you’re back to replacing the computer again; this time looking for what has shorted out two computers?
If the power is still there with both computer and injector(s) disconnected; you’re going to be looking for a short to power in the harness.
The next time you loose pulse at the injector(s), go to the computer and test it there. If you still have pulse at the computer; recheck the harness between the computer and injector for corroded wires or bad connections at a main harness connector.
A corroded wire or connector will go open (disconnect) when it gets hot enough with a load on the circuit.
If my wiring diagram is correct you’ll find #1 injector driver wire in the computer's connector terminal #3 a blue/white wire. Injector #2 in connector terminal #32 a white/green wire.
Sorry for the long post.
Let us know what you find.
Dan.
Canadian "EH"
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