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Maybe this is resized ok to attach.
Also, forgot to mention in the above. I changed out the ICP after blasting the pigtail connector with electronics cleaner. Seemed to run a little better? ALSO, even if I FLOOR the throttle, APP does not go over 75%. It also seems to be about about 40% or so less in what the scanner picks up, than what i would guess it would be passed off of how hard I am pressing the throttle. Fuel pressure doesnt really drop much even when I am flooring it on the highway.
Still looking at this. Strange I know, but 75% is max for APP%. My truck does the same thing with the pedal to the floor. I don't know why they do that, but it's normal.
What Hydra tune are you running with the 160/0 single shots? I want to note it in the graphs.
You are getting plenty of ICP - over 3000psi at times, and IPR% is normal for having the pedal down. That new HPOP is really kicking it.
But FUELPW is not right. Jumping between 0.6 and 3ms or so.
What Hydra box code and Hex code are you running? Are you sure the tunes you are running are correct for your model of PCM?
Any codes reported in the Errors screen on FORScan that could help us?
Try a drive with the ICP unplugged and save a log. Let's see what happens to FUELPW in that scenario.
This might be different situation, but @deanramey had low power/unstable idle, and his issue ended up being a new but defective (counterfeit) IPR valve. He was running the Hydra and 238/100 injectors. The FUELPW looks similar to yours:
Dang I thought I was going somewhere with the APP! That’s odd.
I’ve tried tunes from AA and from the Titan unlock library. The last logs were on
box code is AXD1, hex code is VNAB5Y2.
i hadn’t driven with the new icp unplugged, I’ll do that.
Interesting on the ipr. I got the new ipr from one of those sites most known/popular vendors so I doubt that’s it.
Good afternoon,
I logged the sync verbiage from when first connecting ForScan. It acts like it cannot see some of the DTCs when the hydra is installed, then clears it up when teh hydra is uninstalled? Is that normal?
Idles worse without the hydra it seems (reminder, it has 160/0 singles now). Fuel pressure holds in the low 60PSI range. Also unplugged the ICP at one point. Looked like it knocked the MFDES down for a bit, then it recovers? FUELPW is still all over the place. It was weird. Today, with the hydra installed and ICP still plugged, when I went to go fire it up, it started almost immediately, It built pressure faster than it has been. Then it held idle pretty good. Threw a quick rev, and I thought I had been over reacting the last few days and been impatient, because it responded really quick, FUELPW increased, I thought I was good. then after a while after, it started going into the idle seeking up and down and sounding like a Harley at a stoplight (NOT that there is anything wrong with that. I just I dont expect the 7.3 to sound like that.
ANY of this ring a bell?
Tried to tag CNC FAB as that is where I got the Hydra from. Didnt know if they had seen anything like this. There are a lot of tags that come up with 'CNC' somewhere in the title though.
Good suggestion, Bitterroot. Boy, that FORScan sync issue with the Hydra installed is not normal. We need to figure that out.
I have not plugged/unplugged the ICP while the engine was running - I would expect some gliches during the disconnect. I'd recommend disconnecting/reconnecting any sensors with the engine off to be safe.
Any chance the connection to the hydra is poor? Is the PCM edge connector still tinned, Hydra fits snuggly? All conformal coating carefully removed from the PCM edge connector?
I’ll pull it out again I suppose and check the pcm cleanliness again. But I got a copper tinge on everything, even went over the connectors with acetone, a qtip and a toothpick removing anything I saw, while under my work light.
it doesn’t seem like there is a miss from a certain cylinder, at least doesn’t sound Or feel like it, so I would think the uvch are connected well
Alright, with the Hydra installed again, you have normal idle and FUELPW - it's working as it should. Then after about 30 seconds, it goes back to the shaky PW.
I think your hydra is not connecting well enough. You said you have a copper tinge on everything (on the contacts that you cleaned, right?) - that tells me you've removed too much of the solder from the edge connector fingers. The fix might be as simple as re-tinning the edge connector contacts.
Can you remove the PCM (battery disconnected, keys out of the ignition) and then the hydra, and post a picture of the edge connector, both sides?
I'm not positive about this, Adam. I get tunnel vision sometimes when a possible solution presents itself.
What is strange to me is the data with the hydra disconnected does not show a steady FUELPW. I would think it would, but I have not monitored a stock PCM program trying to run singleshot injectors.
If this is a normal reaction of a stock PCM program trying to control the idle of a singleshot injector, it makes some sense to me that when you positioned the hydra back on the edge connector, all pins making good contact, the hydra took over fueling control and PW was smooth. When it lost contact on one or more pins 30 seconds later, the PCM's stock program took control, and repeated the same jittery PW.
I guess re-tinning the contacts is just the next thing I would try. The fact that FORScan cannot interrogate the PCM for DTCs with the hydra connected (or partially connected) is to me another clue.
After looking at MORE photos, and finding PHP’s FB photos, which I wish I had seenbefore cleaning the contacts, I I jacked up. I’ll look into retinning. Sorry for wasting everyone’s time on my mistakes!! Thanks to AA, Bitterroot and @BWST for walking me through everything. I still don’t think I would have gotten this far without the collective’s help!
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