Can you identify this wires purpose? KA24DE

[Pr0jeCt]

I believe it is a ground wire.. but i dont see where it came off at. this could be why my injectors act odd at idle/stop?The wire comes out of the injector wireing group

[Didderson]

you're exactly right. It's a ground for the injector harness. The ground goes on the block right below where it comes out. I'll try to circle the area where the bolt holes are. There are 2 holes (possibly w/ bolts in them) mounted vertically that you can use to bolt the wire down for a good ground. If you're lucky one of the bolts will still be in there but that hole I pointed out doesn't have a bolt. If you have some extras from the EGR bracket you can remove one of those and bolt this down. Or if you live near me I can hook u up lol. Good luck

[Pr0jeCt]

alright thanks.. i had suspicion that it went there, but when i would press the ground against it, no i didn't notice any change with engine running.. I will find a bolt.. clean that area up then ground it out.

Its a ground for the injector harness yes, but generally whats the consequences for leaving it un grounded?

[Didderson]

Sorry for the long winded explanation but I'm hoping it'll help people who also read this. I'm not trying to belittle you Pr0ject just over explaining.

Well electronically speaking not having a ground doesn't allow the circuit for the injector pulses to complete itself. Not having a complete circuit = it's like only hooking up one wire to a lightbulb. No light. A ground is a little different though, the whole engine and chassis of a car is said to be negatively '-' charged. Meaning that if you trace your negative battery cable it is connected to the battery tray (chassis) and then to the engine.

Making the chassis negatively charged saves car manufacturers from having to run 2 wires constantly back to the battery, because all they have to do is run a positive wire from the 'hot' + side of the battery to the selected switch/power option, and then connecting the negative wire of that power option to the chassis completes the circuit because your car frame is a good conductor of electricity.

Anyway, So your injectors circuit is complete somehow because that ground wire is most likely connected to another ground wire, which is still completing the circuit, but the increased resistance by running a bad ground is hurting the circuit's operation. Obviously so yea, I hope I've answered your question. It definitely matters if you miss a ground .

This brings me to touch on a topic, grounding wire kits. Some people say these work some say they don't. I for one like using just a few nice beefy copper wires and ground the chassis in 2 spots, the engine in 2 spots and the chassis to the transmission. Technically these kits should help because copper is a better conductor than the iron/steel chassis or alluminum cylinder head. But it's probably not noticeable to the naked eye, so I don't know. I know white comet is gonna come in here and be like aw naw dogg, they tested these kits and they're useless! But eh, I'll let you think for yourself.

[Pr0jeCt]

So your injectors circuit is complete somehow because that ground wire is most likely connected to another ground wire, which is still completing the circuit, but the increased resistance by running a bad ground is hurting the circuit's operation.

+1 to that.

[rodgermcdoogle]

ground

[Pr0jeCt]

i just need to find a bolt that will fit. anyone know size? ill go pick one up..or can ya point me to one on the car i can safely remove

[Didderson]

i'm sure you've found one by now but if you haven't. I said earlier the one from the EGR bracket will fit. It is the bracket under the fuel rail that bolts to the intake manifold. Right next to the firewall. If that won't work, then you can afford to take out the intake manifold steel braces on the underside of the manifold. They basically weigh too much and do nothing because the mani can support it's own weight. Remove those steel tube brackets and use the bolts that go to the manifold for your ground. The steel tubes weigh a bit, +1 for weight savings! mine are gone and it runs fiiine