Ran good for an hour without a tune. Now itit's throwing a check engine light and falling on its face 2 or 3 time every gear not getting full boost. Any help is awesome. And nf tuning number if anyone has it
I'm not an expert, but I think the only way you wouldn't need a tune is if you set the MBC to the exact stock boost level (then why waste your money). I feel like it was yesterday that we had the "slow down, do your research, ask questions before slapping parts onto your car" talk. For now, stop going into boost until you get a tune/ damage assessed.
actually, even then you'd need a tune. The WRX does multi-stage boost control based on throttle position. if you were making full boost at part throttle thanks to bypassing the ECU's boost controls.. enjoy leaning out on the low end.
Exactly what I was told. I have done my research but its difficult to get my car running right when grimspeed tells me I need no tune and every shop sais I do.
You need a tune. Before you continue to drive your car. Stay out of boost. Dis-regard the advice from Grimmspeed as it is wrong.
Actually, you need to turn it up more so you can get the right amount of boost. In theory, if your car ran 14 lbs at stock boost, you'll need to run 24lbs of boost to run the same boost level with the new mbc. That will make you feel like your car is faster but in reality, it's only in your head. But what do I know, I read that on the interweb.
Ok edit feature seems to be not working right on taptalk so that wasn't all supposed to be quoted kongzilla
On a serious note, stay out of wot boost until you can get it tuned. For all you know, you may have been boosting 20lbs. Which Could be bad. There are no problems running a mbc. Even seeing a little boost is fine. Just get it tuned properly and you should be fine.
Definitely crank that MBC up all the way to make sure you are getting the MAX BOOOOOST, you wouldn't want to get beaten by a civic!! Also, you should only fill up with 87 octane because it is cheaper and lighter (because there are less octanes taking up room in your tank) so you will go much faster. Finally, it sounds like you just need to get a nice piece of electrical tape and put it over that pesky "Check Engine" light! It is just a distraction and it is only there so noobs will take their car into the dealership so they can steal your money... But seriously, at this rate you will have a brand new engine before long so you might as well have some fun blowing this one up. Didn't everyone here tell you to do lots and lots of research before modifying ANYTHING last time you asked???
Pretty much what Shane said. I call dibs on the piston remainders. I need a business card holder and they work out really well. Ask me how I know.
From the install manual - Warning (read before installing): Before moving forward with the setups outlined below, insure that you have the experience and confidence to properly tune your car. If not, please consult a tuning professional. Without a proper tune you can overboost and damage your engine. https://www.grimmspeed.com/install_guides/PDFs/manual_boost_controller2.pdf
Haha so much win going on in this thread. To the OP....maybe Grimmspeed said its "OK" to drive with the MBC...on the way to your tune, and staying out of boost and don't run it long term. I highly doubt they said run 'er as is! I don't want to start a he-said, she-said convo, but the point is that you need to crank the boost level down and see a tuner asap. Your car is running like poo because it probably put the car into limp mode. Limp mode basically closes the wastegate and (tries to) stop you from making any significant amounts of boost. I don't know how you're driving it to make it stumble...but if you drive it gently, you can make it in limp mode to your tuner. And as others have said, and as I've learned...it needs to be said again: don't listen to a single ****ing word that anyone says or posts. Always cross-reference your information with at LEAST 3 different reputable sources...even if you think one source is reputable. All it takes is talking to the wrong knuckle-head. That being said, I've had a lot of very good luck with the NF crew and I take a lot of stake in their advice and recommendations.
Mike with GrimmSpeed here. Why our company account is blocked from responding or viewing the modifications forum is still beyond me.. cough cough No one here said no tune is required to run it. We went over the issues with not having a proper tune but mentioned that he should still be able to hit his target boost (oem boost levels) without a tune. Even on low boost (wastegate spring pressure) he is still having this issue. His CEL is throwing two codes for cylinder 2 misfires, one for the injector and one for the spark plug. The last piece of advice we gave was to check all connections and make sure they were clean and secure. If that didn't fix the issue then start with spark plugs as he mentioned that he wasn't aware the last time they were replaced. Mike
Come on guys, I know DJ personally and he is a great guy. He asks a lot of questions because he likes his Subaru and wants it to be a bit faster, He might have done a thing that could potentially ruin his car, but we shouldn't be making fun of him, Just help a brotha out!
"Also, you should only fill up with 87 octane because it is cheaper and lighter (because there are less octanes taking up room in your tank) so you will go much faster." things like these, I get it its all fun and sarcasm is alright, but I know people who trash this website due to some people who are just instigators and have a stick up their ass, I don't like to be told "nah you all Subaru guys think you are the $#IT, and it show by how you help the noobs" then I be like WHAT?! not everyone!. but its just my 2 cents which may not mean much or anything. just saying.
Yeah maybe I was too sarcastic but it is kind of funny how many people told him to get a tune in the last thread. I was foolish sometimes too when I was 19 so I can't really blame OP...but for real get a tune ASAP.
yeah, I was WAY too carefull and installed my Grimmspeed MBC at the NF shop prior to tunning, because I heard yes and nos... So I decided to be safe... and Nuke said to lol
you'll find that with literally every single car forum in the world. People talk **** on the internet, it's a way of life. Being able to separate the sarcasm and the general tomfoolery from the helpful posts is a talent that one should develop before they dive into a car forum. Lastly, people are more apt to be sarcastic when someone asks for advice, receives it in spades, then does the exact opposite, encounters a problem, and goes 'WTF?'
See, some of us have been around for 10+ years. The same questions keeps coming up and we keep giving the same answer, go get a tune (See post #2). There is no reason to argue anything different. A MBC on these cars is a waste of money and way to dangerous. You will have part throttle full boost issues, inconsistant low level boost. About the only time a MBC is good is at full throttle. A simple tune on the car will next you consistant boost, and a safe and reliable car. Since your friend looks to only want to listen to what he wants to hear and wants to make MAD POWA for pennies, he will continue to get the over the top responses. Russ
There's nothing wrong with a quality MBC once the car is tuned for it. I've run Hallman MBCs since the 90s on all of my turbo cars, with my current car being the exception. As always, as long as the modifications are done correctly and with quality parts, life should be good. IMNSHO, as always.
Exactly. This is just another thread, in a painfully long list of threads, where the poster got an answer (several) and then disregarded it and did the opposite. When 5 people say "go get a tune" and his response is "but but but," sarcasm will ensue. When you beat a nail flush with the board, you don't go back and hit it 30 more times, you move on to the next nail. This nail has been beaten flush, time to move on. If "go get a tune" is too difficult of a concept to apply, then maybe it is time to get a different hobby.
Look guys I don't care about all the sarcasm that dosent bother me. I get it I'm a noob and nobody knows me but all I'm asking for is help because I know all of you know everything I don't. And for the record it was my plugs. Probobly the stock ones from the factory, cylinder 2 was misfiring so it runs good now. And out of everything yall answerd could someone tell me how to get ahold of nuke to get a tune. Everyone is barking orders and telling me what I'm doing wrong but not one person can answer that? Thanks
I still have no idea why people put a manual boost controller on a relatively stock Subaru when there is a computer controlled system built in the car.
The key word here is "since the 90s". I had a manual boost controller on my 240, and other turbo cars I have built. All of them older cars, that did not come factory turbo. When it comes to modern stuff that has technology built into the car, why not use it?
You can get much better control with the ecu controlled boost over a manual. I find that most who doesn't want to deal with the programming end of it will use a manual over ecu controlled. They can both do the job. On a 2.5 with a small turbo thou, you will want the ecu controlling the boost to eliminate some boost surge in the early rpms.
