ok, i got new (8, colder range) plugs in, changed the fuel pump. had it out on lunch today and it did the stupid cuttoff at 6000rpm's in 3rd again. it only does it at wot, and when it gets to 6000rpm on the tac it pops like i hit the rev limit and all the power dissapears. it is fine in normal driving and fine for wot in 1st and second.


anybody have a clue as to what the hell is going on?

dc pipe (turbo to exaust) greddy ti exaust, aem cai, walboro fuel pump, ngk 8's
not a whole lot of 'performance' mods on the engine but i can't figure this out

 

Do you have a reflash or anything like that? sounds like factory boost cut or fuel cut, what boost are you running?

Also do you still have the stock airbox?

 

+1 That sounds like hight boost cut.

 

Change you plugs back to stock rating and gap them to 0.026. I had the same exact issue and this was the solution. Unless you are running 28+++PSI, you dont need anything better then stock.

 

Yeah you definately don't need that cold of a plug but that may or may not be your problem.. cheap place to start tho

 

The 8s are too cold for your setup. You should be using NGK BPR7ES gapped to .026.

Anyway, this sounds like classic fuel cut. You can't avoid it if you aren't tuned, especially with a TBE, because the lessened back pressure causes your boost to run higher than stock. Do you have a boost gauge, and isn't it reading 22psi or higher? Your boost is just too high for the stock untuned ECU.

 

Echo?

 

hasn't changed with the plugs, and the stock plugs had descent color on them. the factory boost gage is in there and it is going just a hair over 1.5, but i don't have the boost controller on there yet either so it should be on its way back down thanks to the factory boost controller right?

i have a safc, hasn't been installed yet - have an appt with ams, but not for quite awhile till i can get up there to have them help set up.

will the safc cure it, or will it deffinitly require a reflash?

i am still wanting to put the boost controller on there, and i have several other things (gages etc) that are getting installed before i go up there.

good thing this isn't my everyday car.

 

i still have the originals - actually came with ngk iridium 7's from the factory ---------- is that normal for them to come with iridiums?

 

Not sure why you'd post that, XTC. I have a bit more of a reputation on here, so I was re-iterating the notion to hammer it home. Also, you just said stock heat range. I gave the exact part number that he should be using, so chill.

Graphite man, I wasn't saying this problem is due to the plugs. I'm just saying you have no reasons to run the 8s. I'd go back to the 7s. Yes, all Evos come with heat range 7 Iridiums. They work well and last longer than the coppers that many of us use.

Ok, so we know what it is now. You shouldn't install a TBE without an MBC. I don't know why guys keep doing this. We have to explain this multiple times each day when people come complaining about fuel cut. It's the same recipe everytime. People pay $600-1000 on an exhaust right away instead of a few hundred on the more important, smaller mods such as a flash and an mbc. In this case, your boost is going too high because of the reduced backpressure like I said. No, the stock BCS cannot keep it low enough, because it's set to work a certain way based on the original backpressure parameters. If you put on the MBC, you can lower the boost some and avoid the fuel cut.

Why did you go with an SAFC? I wouldn't recommend that. Yes, an SAFC can help to delay fuel cut, but it can't remove fuel cut. What happens is when you remove fuel points on the SAFC, this fools the ECU into thinking less air is crossing the MAF. In turn, the ECU provides less fuel, which increases the AFR to help you make more power. One of the side effects of this is that the ECU induces fuel cut when it sees a certain maximum airflow. If the SAFC is telling it there is LESS air than actual, then fuel cut happens later...at higher boost or higher rpm, if not both. This will still be annoying, so you should get a flash. Not to mention you will make more power with a flash and will be provided additional features that can't be given by the SAFC. AMS can flash now, too, so there's no reason to mess with the SAFC. I don't know if they have launch control like Dynoflash yet, though.

 

You could have said.


"Technical ETC is correct, I agree and so on and so on". It's great that you have a rep and all but no need to step on other people especially when they are right. I know you rip into people when they are wrong but I believe I gave the correct answer, you could have at least acknowledged it. It's kind of like being in class with a kid that always raises his hands and always gets the answer right. When the teacher calls on another kid that same kid still answers even if the other kid did. Just asking for a little recognition here, that's all.

 

I didnt gather that he was stepping on you, i gathered that either he didnt read every post in this thread and omited yours, or he was just re establishing the same point you did. Sounds more so like you want recognition for helping someone out which seems kind of selfish (not trying to stir the pot here though so ill shut up now)

 

If you are not trying to stir the pot, then why would you post something like this? I merely jokingly posted the "Echo" as I said the same thing. Instead of an "Oops sorry man" He basically told me that he has a rep and that my info was better and to just chill. Forget that.

 

Well im not meaning to stir the pot, but im trying to see from your point of view why you were offended. I dont know the guy personaly but from what i can gather, he knows most of what he is talking about. If i were a complete newbie to the automotive world and i had a question that i asked on a public forum, i would feel good if i got a responce to help me fix my problem, but id have more faith in it if it came from someone who everyone on the forum knew was knowledgable. Im not saying you dont know your stuff, you probably do. Its like being at school, would you rather hear the answer from a kid on the class that not everyone knew or the kid in the class that made straight a's. My point is i don't think he meant to offend you, and i hope that i don't either. If i do, i aplogize

 

dont let it get to you all that matters is the orginal poster got the info he needed(we hope) and his problem will be solved and now he has the knowledge to pass on to fellow evo owners so they dont make the same mistake

ok now that i got that out, XTC ignore his cocky comments. he comes off like a ***** but he knows what he is talking about