Low injector voltage
Thread Starter
Teching In
Joined: Jan 2026
Posts: 6
Likes: 1
Low injector voltage Have a 5.3 gen 3, getting a low injector voltage on my HP tuner DTC codes.
fresh swap, I did an eBay harness, at first I had injector issues wouldn’t even run. I thought it was the cheap harness so I pinned out injectors and it checked out, it ended up being clogged injectors. So I bought new used injectors supposedly’cleaned and tested’. I haven’t dove into this with a multimeter yet. But with HP tuners I am getting no misfire history, but getting extremely lean on bank 2 o2. Almost kind of stutters at 5500 rpm but seems to run normal revving up. Looking for a good way to narrow this down to a cylinder without holding it off the chip with a multimeter. I do have a noid kit. I don’t think shutting down cylinders or pulling injectors one at a time is going to solve anything, because it seems to idle fine and run fine until high rpm. Thoughts? Also it’s a pending low injector circuit code, doesn’t give a cyl obviously.
fresh swap, I did an eBay harness, at first I had injector issues wouldn’t even run. I thought it was the cheap harness so I pinned out injectors and it checked out, it ended up being clogged injectors. So I bought new used injectors supposedly’cleaned and tested’. I haven’t dove into this with a multimeter yet. But with HP tuners I am getting no misfire history, but getting extremely lean on bank 2 o2. Almost kind of stutters at 5500 rpm but seems to run normal revving up. Looking for a good way to narrow this down to a cylinder without holding it off the chip with a multimeter. I do have a noid kit. I don’t think shutting down cylinders or pulling injectors one at a time is going to solve anything, because it seems to idle fine and run fine until high rpm. Thoughts? Also it’s a pending low injector circuit code, doesn’t give a cyl obviously.
