Mlhiser12

Figure the problem out finally. At some point, someone plumbed in a auxiliary pump for a fuel cell in the bed. they mounted it out of plain sight where you wouldnt see it unless you were looking for it or you traced the lines. Essentially the factory return line was running to the aux pump, which ran to the non existant tank pump which is capped off. I tore the 366445 feet of hose they installed and hooked the factory return back up where it was originally and it runs like a top. My sump was never leaking either. It was the return hose the whole time which was just laying on top of the tank, dripping down the inside of it, and falling from the sump. All in all, I'm an idiot and shouldve noticed this hack job of hoses and wires. To the fella who put this all in, I hope it burns when you pee.

Yes the quadzilla Fp sensor comes with the snubber My sump is leaking slightly due to my own ignorance. I didnt put it on a flat surface. But the pump sounded that way before I installed the sump which was almost 2 weeks after. I have the same one in my chevy and I've always thought this one sounded odd compared to it.

I never thought anything of it untill I tried turning this thing up. Sucks because it's not even 3 months old and like an idiot, I didnt full out any of the warranty paperwork that it came with

I see. I honestly only bought it to read balance rates on my duramax. Its gunna be out of commission for a while (injectors, headgaskets, turbo upgrades) so I just threw it in the cummins for shits and giggles. This Is a video of the lift pump running while the key is on. I've always thought it sounded weird compared to the identical fass150 titanium in my other truck which is steady and consistent. It has sounded like this since the day I installed it, which was weeks before i installed the sump pump and quadzilla. Does this sound/look right?

UPDATE So I got my boost elbow today and being the dumbass that I am, I accidentally ordered the DDP boost elbow which is non adjustable. Installed it anyways, and my max boost pressure went from 19 to 26. Not bad, but not the result I was looking for. Also, I paid closer attention to the erratic fuel pressure, which still persists after the DDP boost elbow. It acts erratic under ANY type of acceleration, not just WOT. It was even doing it at idle before it reached operating temp. (I recorded a couple videos if youd like to see them) It was blowing a little puff of grey/black smoke from a boosted launch, but still doesnt seem like its fueling properly according to the throttle%/load/boost pressure. (I'm basing that opinion off of my experiences with my duramaxs in relation to turbo lag vs fueling, which has always been way smokier) On a side note, my CTS2 readouts are very odd. where the iquad app shows 19psi max boost, cts2 shows 16.6psi (pre-DDP boost elbow). Post-DDP boost elbow, iquad shows 26psi max, where as cts2 now displays 15.9psi... weird... how accurate are these cts2s? I've seen some people swear by them but I'm beginning to call bullshit. Tonight, ill be Ordering an ADJUSTABLE turbo elbow as well as an analog fuel pressure gauge, like you said.

I see. Well the elbow will arrive tomorrow and I'll report back on that asap, hopefully that eliminates one or both issues. As far as the fuel leak goes on that sump, what do you reckon I can do about that? I was going to empty the tank, pull the sump off, put a thicker o-ring in (if I can find one) and silicone the piss out of it. Only other option I see is swapping in another used fuel tank.

My thought exactly, hence the reason I mentioned the lack of smoke. I'm curious on this as well. Yes. It idles consistently, it only acts sporadic like that under WOT. Come to think of it, I failed to mention that I also installed a beans sump pump. Only reason I bring that up is because I'm having issues with fuel leaks from where I mounted it on a slightly curved surface under the tank by mistake. Is it possible my lift pump is sucking air through the seal of the sump pump? Could that cause the pressure to go crazy like that?

Okay, I was just making sure I didnt need to order the boost fooler as well. The elbow will be here tuesday. What's your opinion of the fuel pressure acting the way it is? Like I said, I'm new to this. I do appologize for any ignorance. I just want to make sure I'm not about to smoke my vp44 or anything catastrophic. A friend of mine believes the fuel pressure issue is being caused by a bad lift pump but it's less than 6 months old and has less than 5k miles.

I read somewhere that the quadzilla had a built in boost fooler, is that not correct?

I plan to as soon as I have a chance. Work schedule is crazy right now, I've been working 12hrs a day for 20-something days straight. I just didn't know if maybe someone could point me in the right direction. EDIT: I also installed a fass 150 lift pump, completely forgot about that. Sorry. I ordered the adjustable wastegate elbow, just waiting on it to arrive but I thought the quadzilla has a built in boost fooler (correct?) and could over come it without one. I've had duramaxs all my life so I'm new to this world. Sorry for any ignorance.

99 2nd gen 2wd dually. 365k miles. Bonestock besides 4" straightpipe, S&B Intake, and quadzilla adrenaline V2. In the video, I'm running the "stock injector race tune" from me78569 that i downloaded from here. Turned all the way up to 5: Im maxing out at 19psi of boost. My fuel pressure sporadically spikes down to 7psi. And the truck doesnt blow any smoke (not that I care, just concerned it's running lean because i feel like it should be fueling for 35-40psi from what I've read) Any idea what's wrong? MAP sensor? It acts like this even in the default power levels, cranked up to 11. No CEL, but I am getting a p1693 code on my CTS2 monitor.

I reset it like you said and I think I figured it out. Thank you for the help.

Me78569 im also having trouble with the ".json" file platform on my android device, which is a galaxy s8 active. To my knowledge, its updated with all the current software available for android, as is the iquad app itself. If I download archived tunes, I'm unable to import them to my iquad app on the device. My phone directs me to the play store where it instructs me to download an app called "json genie FREE" in order to open the document but I cant share it or import it to iquad from there. BUT the file you posted above "nick.json" was easily downloaded and imported to the app. I'm not very savvy when it comes to things of this nature, any idea what's going on?