Chokes off after shifting under boost

**hellssephiroth** · 05-12-2013, 10:40 PM

Hey guys, just switched to a chrome ecu but I did a few other mods as well. I switched to a blow through setup open atmosphere with gm maf, installed pre cat eliminators, and M2 exhaust. It runs great on and off it seems. The other day it was choking off I forgot to tighten a hose clamp, fair enough whoops. Ran great for a few days and now I run to go get some pizza and it seems the car in general is running really rich. Idling at 13 where it was 15-16 and after I shift it runs so rich when I let off the gas it just chokes off.

I figured it was just another hose that blew off but I pulled it all apart and re assembled it and I am still having issues.....

Any ideas? I am still running stock turbos and injectors at the moment if it matters.

**hellssephiroth** · 05-13-2013, 02:23 AM

Well i ordered new O2 sensors..... maybe i will get lucky and that is my problem.

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**Greg E** · 05-13-2013, 08:33 AM

I kinda doubt its the sensors. Try taking away fuel in the areas you're running rich.

What are your long term fuel trims doing?

**hellssephiroth** · 05-13-2013, 09:06 AM

Everything seems all over the place....? My afr is bouncing from under 10 when it chokes off to sometimes 18 all without even hitting boost. Cruising is the only time its decent around 14. I havent touched the fuel maps at all yet.

The only thing i messed with so far in the ecu is turning off the stuff for 1st gen and for vacuum reduction,egr delete, etc. I also messed with the rev limiters thats about it. I can see if i can mess with the maps a bit after work. I suppose i could have turned something off i shouldn't have. I will try the stock flash and see if it doea it.

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**Greg E** · 05-13-2013, 09:32 AM

The ECU doesn't care about your wideband. It goes off the narrowbands and all its doing is trying to make them cycle. In fact, the only time you should even be looking at the wideband is during heavy acceleration. Examining what the narrowbands are reporting to the ECU and what the ECU is doing with that information will help clue you into the real issue.

Replacing a sensor because its not reporting what you want to see isn't going to solve the issue. The sensor is just a messenger.

**hellssephiroth** · 05-13-2013, 03:55 PM

ok here is pics of a log, I did't beat it really just took a little cruise around the block getting a little boost.

Narrow bands

TPS and RPM

Wideband

**Greg E** · 05-13-2013, 03:57 PM

Looks like there was quite an earth quake in your area!

**hellssephiroth** · 05-13-2013, 03:58 PM

Fuel trims aren't showing up at all in evoscan? they are all zeros and one is -25. The pics above were with the stock flash back on it except what i had to turn off for 1g stuff in peripheries 2. It still seemed to do it when i hit 3rd gear and left off. I noticed when I left off in 3rd my bov is acting really wierd. It blew off like 5 times? Never did that before...... It is a Turboxs RFL if it matters. I really want to try out a synapse perhaps I will order one this weekend.