i didnt read the whole thread here, but im having the same problem. make sure you reach up around where the charge pipes connect to the intercooler. thats where mine cracked, and then it just got worse and worse. my whole end tank is covered in jb weld so it would stop leaking.

 

alright well just took it for a nice joy ride.. those trims are wacky and I cant build boost at all.

whistlings coming from the right side it sounds like so thats probably where the crack is.

now what do I do from here. any boost tests I can do to figure out where exactly it is? or do I really need to take everything apart. If so Ill just take it to a shop bc it sucked putting everything on.

let me know what you think.

also since Ill probably be asking this question later, whats a good replacement intercooler if thats the problem?

I have:
CAI
catless DP and catback
IC Pipes
Tune.

is the upgraded IC really better and worth the money over the stock one or what?


thanks a lot to everybody for all the help. I really appreciate it.

 

did you check the endtanks like crazy? thats where mine popped.

if you get a new intercooler id do treadstone. TR8 or bigger i think is the TR10 or TR12 if im not mistaken. you actually just missed a group buy. you may still be ale to get in on it.

and yes upgraded intercooler is sooo much better. no plastic **** that will break. the treadstone intercooler sits higher up so you will most likely rip you front lip off before even touching the intercooler.



https://www.cobaltss.net/forums/2-0l...up-buy-242724/

 

alright thank you..

upon research tonight Ill probably go ahead and make a homemade boost leak tester.. and when I probably find out that the intercooler is broken Ill try to get in on that group buy.

thanks again for all your help

 

what numbers did you see for LTFTs and STFTs?

whistling is probably a hole somewhere

 

if you have aftermarket IC pipes, the could gotten disconnected from the bottom. I threw that code a couple weeks back when my injen pipes kept poppin off

 

If he has a leak trims will be positive not negative

 

Explain? Positive trims are when the Maf sensor is dirty or faulty and reading a lower signal than what actually is. Negative trims is when the car is running rich and metered air is disappearing before the combustion chamber.

Thus positive equals lean condition, negative equals rich condition.

 

Exactly what i thought too. Leak would mean less volume of air going into engine. Which would mean a rich condition. Leading to negatives.

I remember my car going to negative 15 when charge pipe came off. I could be batshit crazy though.

 

you are correct, -18.0% is what I saw with a cracked lower charge pipe.

The reason you'd see massive positive trims if if the MAF cant read how much air is going in, OR you went to an aftermarket intake that has a greater area where the MAF sits... so more air is flowing through then what the MAF was programmed to see based on the circumfrence of the stock airbox MAF location.
example: The stock circumference is about 2.5" is diameter where the MAF sits... going to an Intake with a 3" tube SHOULD logically flow more air through that area and the MAF is still only reading air flow for a 2.5" tube, not 3".

 

Continue thinking that. Positive numbess mean there is a leak in the system and unmetered air is going into the motor resulting in a lean condition, Usually post throttle body. Negative is a rich condition. Now im not familiar with how the maf correlates with the intercooler setup on the lnf but that shouldnt matter

 

I understand where your coming from zrated89, but what happens under boost? after all this car pretty much makes boost no matter how slow your accelerating. You will at least see 0 vac or 1-2 psi under gentle driving conditions. Its hard to imagine that at partial throttle that more air is gonna make its way in there with charged air blowing out.

 

See that's where your thought process is flawed. Unmetered air is not getting into the engine. The MAF reads a volume before the intercooler, leak happens at intercooler and the leak causes air to leave the system. Which results in less air than what the MAF thought actually going into the engine.

 

And I will add to this. The reason air is leaving the system is because it is charged and being pushed out.

Just saw the pic of the SS S/C in his sig... might be the reason he thinks a leak in the system means positive Fuel trims.

 

With a post MAF leak>>>MAF inputs for MORE air than the engine *sees*...that's RICH baby.
So trims are gonna try and correct for that>>>NEGATIVE trims are the result.
The OP has a boost leak..prolly broken end tanks from hitting that ****.

 

Thats why in my post i said i wasnt sure where the maf got its reading now that i know its pte charged air that makes sense. On any other setup what i said is how it happens. Now that i know how the maf is with the intercooler setup you guys are right

 

[QUOTE=ronn;5687161]With a post MAF leak>>>MAF inputs for MORE air than the engine *sees*...that's RICH baby.
So trims are gonna try and correct for that>>>NEGATIVE trims are the result.
The OP has a boost leak..prolly broken end tanks from hitting that ****.[/QUOT


that would be the case now that i know the maf gets its reading befire the air is charged. This wouldnt be the case if it was after charged air