5.3 LS swap- Rpm dropping
I am actually getting 12v at the injectors, so far I had tested only 2 of them. I wasn't getting 12v before because I was probing from an opening at the back of the injector connector, but that wasnt touching the actually pin. Measuring at the inject pin itself did read 12v.
Would some like this do?
IMHO, yes you had at least a temporary short; worse, the fuse did not blow, but instead overheated and belted itself and the fuse holder.
Yes, that Amazon fuse box should be fine.
However it is strange that you have a large black wire going to the now-melted fuse holder. Is this a different power source? And why is it black (the color for ground)?
Yes, that Amazon fuse box should be fine.
However it is strange that you have a large black wire going to the now-melted fuse holder. Is this a different power source? And why is it black (the color for ground)?
IMHO, yes you had at least a temporary short; worse, the fuse did not blow, but instead overheated and belted itself and the fuse holder.
Yes, that Amazon fuse box should be fine.
However it is strange that you have a large black wire going to the now-melted fuse holder. Is this a different power source? And why is it black (the color for ground)?
Yes, that Amazon fuse box should be fine.
However it is strange that you have a large black wire going to the now-melted fuse holder. Is this a different power source? And why is it black (the color for ground)?
And get some more red wire.

Performed the tests below
- checked voltage at all the injectors pink wires at the connector : 12v on all
- Did a noid light test: all injectors did light up
- ohm between injector pins: 13.5-14.2 ohms
At the fuse box, with the car running, I see 14.05v on those two circuits with battery constant power source, but 13.7v on the injectors power wires, and those circuits that get key on power through the relay. Not sure if this is normal. Still running like crap, and p0200 won't go away.
where else should look?
- checked voltage at all the injectors pink wires at the connector : 12v on all
- Did a noid light test: all injectors did light up
- ohm between injector pins: 13.5-14.2 ohms
At the fuse box, with the car running, I see 14.05v on those two circuits with battery constant power source, but 13.7v on the injectors power wires, and those circuits that get key on power through the relay. Not sure if this is normal. Still running like crap, and p0200 won't go away.
where else should look?
Performed the tests below
- checked voltage at all the injectors pink wires at the connector : 12v on all
- Did a noid light test: all injectors did light up
- ohm between injector pins: 13.5-14.2 ohms
At the fuse box, with the car running, I see 14.05v on those two circuits with battery constant power source, but 13.7v on the injectors power wires, and those circuits that get key on power through the relay. Not sure if this is normal. Still running like crap, and p0200 won't go away.
where else should look?
- checked voltage at all the injectors pink wires at the connector : 12v on all
- Did a noid light test: all injectors did light up
- ohm between injector pins: 13.5-14.2 ohms
At the fuse box, with the car running, I see 14.05v on those two circuits with battery constant power source, but 13.7v on the injectors power wires, and those circuits that get key on power through the relay. Not sure if this is normal. Still running like crap, and p0200 won't go away.
where else should look?
- continuity between injector and pcm control wires: all good.
Any suggestions on where to look at this point?
Weird how this just happen right after testing pin 20 and 57 above.
Its an aftermarket harness.
https://highperformanceinjectors.com...RaUIHmw_OoxxlG
Its an aftermarket harness.
https://highperformanceinjectors.com...RaUIHmw_OoxxlG
That pregnant red wire has been hot for some time.
As I mentioned, take the harness out and trace that red wire circuit thru the entire length. BOTH sides of the fuse.
An instant dead short should pop the fuse, not melt it.
We've seen way too many of the cheapo fuse panels melt due to poor contact w/ the fuse blades, cheap fuses melt, and bad wire crimps creating havoc, to use the cheapo parts.
Looking back at the fried panel, I think the "failure" was a period of time in the making, and the panel "committed suicide" about the time you did the tests. Checking voltage didn't cause this.
That pregnant red wire has been hot for some time.
As I mentioned, take the harness out and trace that red wire circuit thru the entire length. BOTH sides of the fuse.
An instant dead short should pop the fuse, not melt it.
We've seen way too many of the cheapo fuse panels melt due to poor contact w/ the fuse blades, cheap fuses melt, and bad wire crimps creating havoc, to use the cheapo parts.
That pregnant red wire has been hot for some time.
As I mentioned, take the harness out and trace that red wire circuit thru the entire length. BOTH sides of the fuse.
An instant dead short should pop the fuse, not melt it.
We've seen way too many of the cheapo fuse panels melt due to poor contact w/ the fuse blades, cheap fuses melt, and bad wire crimps creating havoc, to use the cheapo parts.
for the 2 circuits needing constant battery+. Is this power wire to the battery that you suggested I trace down ?
Thanks
The guy who made the harness can't help much. He's suggesting to return the harness for him to fix. Lol.
Clearly we don't know what we are doing.
Also fwiw... don't hack mod your daily driver.
I already told you that i did strip the wiring and didnt find an issue there.
Melted fuse and a melted fuse box but no problem with the wiring.. riiiight. You just don't know what you're looking at, or didn't do it. As I said, I'll believe you when you post a picture of that wiring harness stripped apart.
You keep having a Circuit code, for a reason. Some intuitive thought should be kicking in by now.










