as long as it will seal up on the port it shouldnt be an issue


sound slike u should be up and ready to do some testing soon

 

I would hope the turbo isnt goin bad already. That thing is fairly new right?

 

pull the compressor and turbine housings and check for contact between the blades and hosings , thats usually the only time a turbo will squeal

 

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man your killin me..... that gave me a headache from 2 states away.

 

I read this thread every time there is an update hoping and praying you get it figured out. I would really hate to see you give up on such a nice, strong car, but seriously it is fighting you every step of the way and now Mother Nature herself is after you. Good luck, my thoughts are you need to take a couple month hiatus from the car.

 

Dont feel to bad man, my car just stopped working over night. Ran fine on a saturday night, parked it and sunday afternoon wouldnt fire. Hasnt even coughed. Found a lose crank sensor but fixed it and not the issue. Never seen something happen overnight when i never touched it. Cars are funny creatures

 

my ls1 car recently started randomly missing/sputtering and cutting off/not restarting. i looked over everything and the only thing i found was a green/corroded pin in the pcm connector. its one of the pins bringing 12v to the pcm. might be something to check.

 

Mine dont make a sound trying to start. Its like its not even trying to fire plugs. Ecm was just repinned this year and clean. But will check and not rule that out

 

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how old is the 02 sensor it might just be time for a new one

 

X2. That or controller is bad

 

Do what makes you happen man. I can certainly relate, my new house is on a canal with a boat hangin behind it, and I have a turbo thirdgen that costs time and money and isn't where I want it to be yet! I have discovered that the boat is more enjoyable since it's harder to have girls in bikinis and beer in a camaro than in a boat . I just tuck the camaro away in a shop and live life, when winter rolls around or I see a bad *** car on the road I head up to the shop, or order some parts and work on the camaro for a week or two until I'm fed up then I go back to living life and trying to make some extra scratch. If you can swing the shop $$ that's the way to go, carry some insurace on the shop (or just the car!) and enjoy it. Dont change the way you live because your worried about what someone else might do. Plus, if the car get stolen, buy a C7-Z06 and forget about the iroc AND: slap a new WBO2 in there, rebuild or replace that turbo if it needs it, and drive the wheels off that thing! It's got some scratches now, time to enjoy it!

 

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My boat has been sitting on the trailer for years. Every year I say I'm going to take it out.

The horses haven't been ridden in almost two years. The car has been in the garage for two years. About the only thing I ever use these days is the motorcycle. Growing up is tough.

-- Joe

 

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if you decide to sell it i may be interested....?

 

Ouch I feel for you, I imaging the head gasket is blown now.

 

So I've been reading this and following best I can, but it's gone over a million different things.

The outstanding problem right now is that your leaning out under boost, and we think it's due to a fuel flow issue?


I know pumps have been discussed, amperage, fuses, bade o2 sensors, etc.. What's the current theory ?

-- Joe

 

hes changed the feed and return line with no change, i know he talked about swapping in the walboros he has not sure if he did

if he didnt swap pumps , i still vote pump, or voltage drop issue
i still wouldnt rule out an injector issue though

if fuel presure is droping its more then likley a pump issue

like i said before ive had 2 340lph pumps go bad on me first one was my fault , second went to crap after a few days

 

That would be pretty easy to figure out, get an electronic FP sender and wire it to a spare input on the megasquirt and log fuel pressure.


Astro: Can you post or email me your log and msq file?

-- Joe

 

he had a mechanical presure gauge installed before

 

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it could work for testing , why didnt u reuse the factory feed as the new return though?

when testing pinch off the return line to deadhead the pump and see what voltage/amperage does as well

 

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Man Id hate to see it go, I would keep at it, my car is as cursed as can be, it has taken 2 years to get it almost right, if you keep at it it will start treating you right eventually

 

It was all worth it to make that video!

 

How is the fuel tank vented ?


-- Joe

 

I think all of us think our cars are cursed at some point.

 

Let the car sit for awhile and let the bad memories go away. Sometimes coming back to it after a while will jog your memory and you will fix or remember what you forgot to do the first time around.

 

I vote keep it.

I called my turbo regal "The Bad Luck Buick" but I miss having that car.

If anything take a break since you have other irons in the fire, or something like that lol

 

This has always worked for me, when my brother blew both head gaskets I didn't touch the thing for 2 years... Surprisingly I'm still using the same stock block after scraping all the built up crud off the cylinder walls lol. Good luck either way on your decision.

 

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need a good vent setup on there for sure. build yourself a good fuel system from all angles, 100% legit good to go. big feed line, big return, no problems inside the tank, no problems inside of the rail, make sure injectors are all good, good regulator..... and then move on to the next questionable item.

 

I would try a different fuel pump before I shipped it at a minimum since you have recorded the fuel pressure acting up in an odd way. Did you ever notice anything in the tank that could slosh and block the pump screen?

 

Between a troublesome thirdgen and a GTR, i would go GTR

 

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You have my sympathies on this, being in IT I can totally appreciate where you're coming from. Out of all the things in the world I despise, perhaps one of the biggest is letting a machine beat me. Besides this the time nature due to you trying to sell your house adds an element of urgency to it not too dissimilar to a (very) rough day at the office. Do what you have to IMO, and the best of luck to whatever you do either way.

 

gone

 

When did the fuel pump issues start, did it start after swapping to MS?

 

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Alright then. Sorry your having all these issues with the roc. I wish there was more I could do to help Bro. If you end up moving back into your old home I would just let the iroc sit until spring time at least so you can clear your head. Good luck man

 

I would disconect the return line, let it flow into a container. Put a rubber stopper on the end going to the tank to not let air in the tank.

Key on, and go into tunerstudio and enable the pump test mode. Let it run for a few minutes watching fuel pressure. Crank the regulator up.

I suspect what is happening is under high fuel demand your pressure differential in the tank is putting too much stress on the pump. At idle and low fuel demand you're returning most of the fuel to the tank so it's not creating vacuum. When in boost, maybe your taking fuel out too quick.

That is why I asked about the venting to the tank.

I know you are frustrated, but this is a problem that can be diagnosed without leaving the garage.

-- Joe

 

Hello,

Im a subscriber on your channel and can tell you how much I love the videos.

1. God your determined. I get upset and defeated feeling over less, I cant imagine how your feeling.

2. Don't sell the car, sell the swap. A LSX with H/C/I will make what your making now and be trouble free. I think in one of your earlier videos you have commented that it was an option. Even referring to the GTO of your buddies as quick or quicker with less done. Hell a 6.0 or 5.3 outta the junkyard with a auto or t56....????

Dont give up.....

Signed your loyal fan,

bonylad

 

hp-wise maybe.... but not torque.
this thing probably makes hits its hp peak nearly 3,000 rpms sooner than a hci ls1 making 450rwhp. to do that means its making tons of torque down low.
if the fuel problem was fixed, h/c/i would put this car easily at 800hp i would imagine.

 

Heads intake this combo with fixed fuel sys and yes it will scooooot

 

To be sure; however, Im trying to empathize with the situation. Sick of money being spent on a problem only to have another arise or the existing one get inched further away from a solution.

I would check the megasquirt.........



About 3 minutes in.


If you KNOW the car should be doing this or that with the setup you have then you have to look at how its being managed. I would suggest recalling your problem with timing and how the MS reported it. Look at that again and consider if the MS could be somehow be related to your issue, then upgrade or rebuild it? IDK. It wouldn't hurt to pull it, maybe revisit the tune? Have you thought of letting a pro tune it? Your obviously skilled but perhaps a fresh look on the situation? I had HPTUNERS on my 06 Cobalt SS/SC and thought I knew a thing or two.....but alas my tunes were crap and I relied on tweaking existing canned tunes.....more power and better driveability would be had tuned on a dyno. I was cheap.

As to why I even suggest swapping? Well for the money you could sell your whole swap for....you can buy a running LSX setup and be done with it. Not that I want you to....but it would feed my addiction for more videos...lol a little greedy here....

 

i believe he checked his fuel pressure with a mechanical gauge while driving? if so, and the pressure fell off, its without a doubt something limited in the fuel system. since it has a big feed now, thats not the problem. which leaves the pump, return line, or a restriction in the rail. if the return was restricting, it might falsely raise the idle pressure. at wot there is less fuel flowing through the return, so it becomes less of a restriction... which could allow the pressure to fall off some from where it was set at idle.

how much fuel does this thing actually use? have we done calculations and all that? does it jive with the tuning in megasquirt? (injector size, duty cycle, psi)

 

That's my point. If the parts are good and according to the man he has replaced literally everything with a system capable of supporting WAY more.....perhaps its the way the parts that are able to be told what to do - aren't being told correctly?

I recall watching videos in relation to the timing on the car and the MS was reporting it way lower IIRC than what it was actually....perhaps that or something else may be a factor? Im not sure but is fueling related to timing vs volume or air ? get one of those acting up......car not reading correctly someplace ...........it wont supply fuel in relation to timing and mass...ergo the leaning out because its being told to. He already has checked and voltage to the pump is not a factor....its dropping because its being told to.

Im just saying, that video above rings home with me. He had all this stuff and wasn't making near the power it should have been. Was related to the tune/ FAST. Take it out and look at it to make sure you don't have a cap or something wearing out.....you did build this right? Then....take another look at the basis of the tune.