I believe a dealership can see how many times a car has been flashed previously. If it was Trifecta, Vince should have your vin on file. If its HPtuners, you may never find the original tuner.

 

Well I just got back from the auto shop, 3 cylinder misfires: 1, 2, 4. the Idle control code again and still got the bypassvalve code... what kind of spark plugs should i purchase? Guessing a standard tune up would be a good start.

 

:[ that's not what I like to hear, more money to spend I don't have haha what exactly on there are you thinking should be upgraded? sorry I can't just look at a turbo and call out every piece. I know basic functionality; other than that this is gonna be one hell of a learning experience for me.

 

That's far too small of a turbo to be a pte5557 and that looks like dejon's shitty turbo adapter elbow on there so it might very well be their kit. Hahn uses a similar adaptor design, just with better materials.

I'm not getting into this can of worms though. This one's all yours Cuda..

 

I say go the tune route first.

 

There's more going on there than a tune alone can have a prayer fixing.

 

Yeah not that I read the last page I definitely agree.

OP i revise my suggestion and suggest buying the OEM LNF Turbo assym from zzp for 499 and replacing all that crap. Thats the cheapest way, otherwise a 1200 ko4+ or 1800ish zfr

 

He also needs the correct exhaust mani, plus downpipe, maybe even exhaust connection. He needs to do a boost leak test. The maf code then stuck bpv code means the ecu can't make sense of the data its collecting because maf/map values don't agree. I would recommend a boost leak test, then if there are no leaks, take the car to a shop for a leak down test, then get ahold of a tuner.

 

This thing is such a headache. I would say F it and go to stock. Wayy to many variables and we dont even know the tirbo model. For all we know it could be the ebay delux turbo with a supercharger and electric fan assist lol

 

Its not a **** turbo, its a precision turbo, we just don't know which one it is. Switching back to stock at this point will be a larger pain.

I'm with Cuda that most of this looks semi custom, its hard to tell from the pics what exhaust manifold is used or it its custom, the downpipe def looks custom.

 

Maybe swap for a zfr? It just looks like more trouble than its worth

 

ZFR wont fit correctly, the exhaust mani is not stock. So he'd need the ZFR, the stock exhaust mani, the stock exhaust elbow, plus all the correct oil/coolant lines, and then about 3-5k miles down the road a new 3rd gear if he puts any more power than a KO4 could put down.

A boost leak tester (~$30 to build one) will identify if there is a leak in the charge system. A engine leak down test will test the engine health, which will give the OP a better idea if a tune will help.

 

And this is why I ask guys like you before I mod.

Man it just seems like such a headache. Either way if he decides to swap turbos hes going to be in for fun.

 

Buying a already mod'd car without knowing what has been done is a headache. The OP can get it figured out but its going to take some work and time, if its not a primary car then it can be taken care of.

 

Im thinking the stock exhaust manifold is there. That looks like an adaptor like 09CobaltSS1 said. I know Dejon had a turbo kit and I think they used a precision turbo in their build but that exhaust up pipe.... Thats not retail quality so I think theres some customization there. Its probably difficult to capture a picture of the exhaust manifold due to its location but I think its necessary to see that. I want to make sure it wasnt modified.

If it is, then you need the stock turbo, the exhaust manifold, the up-pipe, an upper charge pipe without the flange, the BPV if it doesnt come with the turbo assembly, definately a reflash to stock tune from someone with HPtuners, the intake is possibly okay, and you need to find someone or a few people with the tools to take that bad boy apart over the weekend and replace everything.


Yeah I did think it looked to small but then I thought maybe the photos were an optical illusion since they were all close up.

No wait! Dont go! I dont know what im talking about! hahaha

 

Well it could be an ebay knock off. I remember a few years back that there were some chinese turbos relabeled as brand name quality stuff. I think there were some EFRs on that list too lol.

 

You should have the stock plugs. No need to get fancy stuff.

ACDelco 41-103, I believe thats the stock plug?

 

I didnt know they made knock off branded turbos, but I guess I shouldnt be surprised since they make knock off brand name everything else. OP did mention no shaft play though, but he couldnt find a serial number which I assume the real deal would have a model plate.

Probably the easier way to get a pic of the exhaust mani is remove the downpipe and come from below (trying to recall from memory the last time I was under the car and I think you can see it from there)

 

its 41-108

 

From what I can see I've seen no serial/model number or name on the turbo. Just the precision logo. I'd love to find out it's a good aftermarket turbo. It wouldn't bug me to be able to choose what pipings and set ups to run. Is it possible to go to a atmospheric bpv since I'm pretty much forced to re-do this set up anyways. I have a buddy with a HHR SS (works at a chevy dealership as a tech) so I'm gonna meet up with him and see if he can help me out at all.

 

Yup! sorry, I knew 41-103 didnt look right. close tho

 

also; does anybody know anyway to identify this turbo? I feel like the first step would be finding out what I actually got down there... I don't like the sound of the possibility of it being a knock off; when it wasn't in limp mode it definately had power, now its still quick it just won't boost.

 

Atmospheric is a pain in the butt for tuning but it can be done right. The problem is that the car accounts for the recirculating air since its after the MAF on the stock setup. Since your blowing off to atmospheric, your losing measured air which is like a boost leak.

I remember Treadstone making a lower chargepipe with an MAF relocation, this requires tuning too but makes the Atmospheric BOV more reliable since the air being lost is no longer measured. Something id look into with a tune to fix this problem and keep the turbo setup the way it is. If your missfires are caused by the tuning with this setup that is.

 

Only thing I could think of to identify it is taking it completey off and taking multiple angle Hi-Def photos of it and either posting them here or sending them to precision and asking them what it is.

 

Found it. I think you have the Dejon 5457 turbo kit.

https://www.cobaltss.net/forums/4672545-post42.html

That up-pipe look familiar with those weld seems? how about that adaptor piece?