the banks aren't different enough to warrant a problem.

If you had a misfire on a cylinder then it would most likely throw a misfire code.

 

Thats what both the tuner and the motor builder said. Also they said there can also be time where even tho you have a fuel issue where you may think there would be a misfire issue theres not.... I guess that's whats going on in my case.... i don't know.

 

if you want to find an exhaust leak, cap one side of the exhaust and run a smoke machine on the other (sealed)

 

Ok so the update: DW found nothing wrong with the injectors, but Mike at DW said he was going to swap them for new ones anyway. ( weird ) Did the compression test and everything came back ok. Sent injectors to DW to have tested and they tested fine ( so they say ). We blew out all fuel line and cleaned everything out from the regulator. As of right now were putting everything back together with the new 850cc injectors and are gonna do some street pulls while loging.
Just seems strange to me that they are swaping out my old injectors for new ones when they said they tested fine. Don't know hope maybe it is just a freak thing and the new injectors somehow will fix the problem. I mentioned the computer, but tuner said eveything was working fine thru up-rev. The voltage and wht not..

Anyone have any input?????

 

injector flow, injector dead time, enrichment sensitivity, afr target map.....tell him to look at those tables and tune it out.

 

at least it was free to get them checked out

 

exhaust leak

 

Well buddy pretty much I got a call from the shop and they pretty much said come and get my car cause they don't know what it is. You and others have said about the exhaust leak. I talked to performance motorsports today and Andrew said although he hasn't looked at the car he is also saying exhaust leak. I said somthing about the computer and he said very very rarely do these computers go bad. He was saying the greddy manifolds ten to crack and theres a good chance I may have a leak there. I explained to him my kit is new he's response was anything is possible. Smoke test will tell. The guy who was working on my car never did it cause he feels it's somthing else cause of all the facts so far. He also told me he doen't have a smoke test equipment. lol full shop and no smoke equipment idk!!! Anyway I'm lost.
If all compression test came back ok, all injector test came back ok, and what if there is no exhaust leak what else can I look at?

 

Before going any further I would get the exhaust leak test done. It is not hard, and you don't need a smoke machine.

I recently did this on my car. Took an o2 sensor plug, drilled it, tapped it, screwed in a fitting and hooked it to my compressor. My up pipe at the turbo was pluged and I was able to pressure up the entire system to 40psi. Found the leak in not time, it was a cheap header to engine gasket that is probably burnt through in one spot. OEM metal gaskets FTW.

 

Gamermodz cracked his greddy manifold in like a couple weeks.

Dont count that out

 

That's what imma have them do when I take to the other shop. The thing is I have a broken leg rt now and I have to let the shop do it cause I'm in no shape to work on a car rt now.

 

From what I hear they tend to do this. Could he hear it tho? Could he tell by noticing the sound of a exhaust leak? Also I talked to Vince at RT Tuning and he asked if I was running aftermarket fuel rails. I told him I was and he said it's a good chance it's the dampners. Well the fact that there is no more dampners.. Me and Vince had done a ton of work together before so I feel were on a different leval when we talk and he sounded pretty confident. Not to say that's it but he pretty much said no to worry he'll get it and fix it. hopefully he is right!!!

 

Would fuel dampeners on the rails somehow have a effect on this some way?

 

interested in knowing what the cause is...

 

There's a thread in the tuning section about this, basically in some rare cases lack of dampers can cause lean conditions/misfires. There's no rhyme nor reason... I don't have dampers and my fueling is fine.

 

the fuel resonance problem from missing dampers isn't anything like the problems you are having.

remember, dampers are missing on both rails so you won't just have 1 bank go super lean. The damper problem is usually a fast lean spike and so far it's been always at the same rpms for all of us that have problems. It's not a continuous lean condition like yours.

 

I am not 100% sure when it cracked but it had definately been months. We were just randomly checking everything for leaks and from the top, we noticed a decent size crack in the top of the manifold. We then lifted the car in the air and it was worse on the bottom. These were ceramic coated too.

Now they, and the entire exhaust all the way to the rear of the car is wrapped with DEI Titanium heat wrap and the turbos have the DEI titanium turbo blankets on them.

This crack caused false readings on the 02 sensor.

 

I know brotha I am lost!!!!!! I have no idea wht it could be. A leak like you said yea maybe but I really think its somthing else. Not saying you couldn't be right. I'm hoping it is a exhaust leak. This way it's nothing major. nothing has changed since the motor blew other then a new motor, fuel return, and I did a wire tuck. The wire tuck there wasn't any wires I had to extened so I can't see it being anything like that. I don't know bro I'm running out of interest with this car tho. This is a issue that has everyone scratching there head. I'm taking it to RT Tuning on weds. so hopefully these guys will figure out what is going on. I just want it fixed at this point. And like I said I have no clue at this point!!!!!!!

 

I have a question, do you have your main fuel line splitting to 2 lines to enter both rails simultaniously then running lines off the other ends of both rails back to the FPR simultanously?

For instance, I have a -10 running from the fuel pump in the rear and before the rails, it splits to 2 -8's. Each -8 goes to each rail. On the other side of each rail I run a -6. Both of these -6's goe to each side of the FPR.

The reason I ask is because if you have the fuel enter one rail, then exit the first rail to lead to the 2nd rail, then from the other end of the 2nd rail to the FPR, you could have a lean bank.

 

this is a good idea but this would be the first instance i've heard of it causing a problem running a return system like that. I ran 451hp and 14psi on my vortech with a return system setup just like that and there wasn't a tenth of a difference between banks. Many others use that "stage 0" style return system without issues also.

i would still look into it, but it would be very low on the list of possibilities. He shouldn't be running out of fuel with that little of boost and fuel requirements. I could see it maybe if it started doing this nearing the max of the fuel pump though.