Hey guys, I have been in desperate need of help lately, my car has been acting up on me and been to the dealer over 6 times and they have placed multiple things and still acting up. Brought it to my friend that has an SS and he believes it is the second 02 sensor. What is happening is I am getting a CEL that is wanting too much fuel and I am running lean. It basically on cold start wants to shut off on me and has a few times. It is like the exhaust is choking and cannot let out.

I have GMS1, K&N SRI, Catted DP, forged BPV, Dejon upper charge piping. My question is and I have heard from a few people, that a tune (like HP or Trifecta) will cure those hiccups. IF this is indeed true, I believe I am doing HP tuners. Just want some feed back from you guys!!!

Here is a video of what I mean about the cold start.

 

Bump! Someone has to help

 

Dollars to donuts your intake is throwing off your fuel trims by a ton and causing this. Try putting the stock box back on and see what happens.

A tune could help but there are plenty of people with good running gms1 cars that could help you out as well.

 

You have all those mods on without any tune? Yeah I would say that is your problem.

 

Yep you need a tune buddy.

I had a trifecta tune on my SS/T and then installed a K&N SRI.....without updating the tune (no time been working)...the car was running like crap and getting terrible gas mileage. So i removed that intake and put it back in the box.....awaiting funds for a hptune.

Also check that pcv valve thingy on the intake manifold.....if thats bad it makes the car run super crap! LOL

That forge BPV....is that the upgraded recurculated one? Or is it the one that vents atmospheric? If it vents atmospheric....and with a stock tune (even gmst1) the car will not run properly. You will need a tune for it too.

 

I have your list of items and my car runs perfectly fine on the stock tune. I dunno about GMS1. You have the K&N intake filter rotated into the correct position?

 

I have never seen off fuel trims do that, but what u describe is happening to me right now on startup, and accompanied by o2 stuck lean code. If u haven't changed ur primary o2 , change it and I bet it will solve it. Secondary o2 will cause nothing but a code so don't worry bout that

 

^^ that. Car is very sensitive to positioning of the K+N.

Beyond that we'll need to know what actual codes are being thrown to help you. Start with the K+N first. The two turbos with K+N that I've worked on have been most happy with the metal line in the filter oriented at 11:00.

 

Woops, tom posted in the middle there. I was agreeing with Joe.

 

The code that I am getting is P12195 and I state this quote for quote from the dealership

"Lean code found. Called TAC was advised to check fuel pressure and injector balance. Also smoke tested intake. No concerns found. Customer advised to return vehicle to stock equipment before any further diagnoses."

My intake in the video provided is in the 1:00 position so I will try and adjust that to the 11:00 one. If I just need a tune I am willing to do so. Heard a lot of good stuff about HP tuners

 

I say it is your intake.
The PCV valve rarely goes bad. And the evap solenoid would cause a lean condition at idle when vacuum is there but a rich condition under boost.

 

I agree with everyone saying it's your intake. From what I understand the K&N SRI is a bitch to deal with.

I almost wanna go back to the ZZP tube and airbox mod set up

 

Try resetting your fuel trims/ecm by disconnecting the negative terminal and touching it to the positive terminal for 30 seconds. See if it helps you.

 

It took me 5 minutes to get mine right and 15 minutes to get minizr1's right. If that's a bitch, then yes, it's a bitch to get right. Once you have it right snap a picture with your phone or mark the tube with a paint pen and never worry about it again.

Really though, it's not a big deal.

 

Well not me. Took me forever! No matter which way I turned it.

So I just ended up putting it somewhere and sending logs to get my car tuned for it. Granted it's my fault for being irresponsible to begin with, but I'm a true believer of "simple." The more complicated something is the worse it is in my book.

Another user back in the day can't remember who he is, but he had issues too and just got the regular 0 offset cone filter and tuned for it and said no more issues.

I may try that, but probably not

 

Don't know what to tell you. Your experiences don't match mine. But I don't know why.

 

Simple answer:

vahdyx = lazy

Sox-Fan = not lazy

 

Ha negative.

I rotated the filter and reset my ECU with no luck. This process took hours, plus I'd like to think it's more "work" to log than it is to do "10 mins" of rotational work that you guys were fortunate enough to have.

I did end up buying a replacement filter and snapped a shot of its position so we'll see what happens next cleaning.

 

What part of Houston are you in? I tune all around Houston, sugarland, pasadena, conroe, tomball. Give me a call at 713-560-3889. Il help you get the problem resolved and set you up with a gas or E85 tune. Il be up late tonight finishing up on a couple cars. I tune the cobalts with HPtuners by the way.

 

couldn't it be a bad MAF also? a bad MAF sensor would cause a 02 lean condition no?

 

I got charge pipes and intake, used to have catless... on GMS1. Everything ran fine catless with increased mileage.

With the catless gone and now with the intake and charge pipes, car does run like **** when its cold, but only for 1 min max. Also my mileage has gone down as well.

Im with you pretty much, ripping these goodies off I just put on, getting a trifecta tune later in the summer. In the meanwhile, dealership visits

 

go HP not trifecta

 

Go with either, they are both good

 

Il never get a HP tune lol. Not worth it at all.