Sr20det rough idle no leaks

[310westslide]

I have a sr20det that started idling rough since yesterday for no reason I checked for boost leaks and any type of leaks and nothing my afr is reading high n low like crazy

MODS:
power fc w/ power fc commander
front mount intercooler
methnol kit
555cc tomei fuel injectors
t28 turbo w/ s15 turbo internals
turbonetics bov
electric fans
Nismo fpr

And some other thing I forgot like intake

Idles when I'm in a complete stop
http://i6.photobucket.com/albums/y244/fairyodd/60ced437.mp4

[jdm213]

if your air and fuel ratio is going high and low u shuld check your fuel system since most of its aftermarket and for a fact something went wrong start with injectors and work ur way down

[mr2gons14]

this may not help but same thing happened to me the other day engine sounded like it was tryin to choke itself and running rich. My plug gaps opened up from .028 to .043 swaped em and problem solved. could be ur problem

[ultimateirving]

Also i had this issue when swapping chips in my ecu, something in my Ecu plug wasnt making a full connectiong causing it to dump fuel and run in limp mode. Make sure ur harness is good and snug.

another thing you can do is start diagnosing separate components. Unplug maf with car idling see if things change.
U can also check TPS voltage with car idling should be at ~.45v

[310westslide]

Ok so yesterday I check for any vacuum leaks or boost leaks and I find out MY TURBO ELBOW IS CRACKED can this be the cause of running rich rough idle and my speed odometer going crazy I think it's throwing off the o2 sensor


Which I will be fixing ASAP

[mr2gons14]

its a possibility id reccomend changing it out and go with something not stock the stock ones are crap.

[codyace]

1. Check for vacuum leaks
2. Ensure IACV is clean and working
3. Measure TPS voltage to ensure it's ok.

I'm going to bet on a vacuum leak to be the main culprit and a faulty/dirty IACV to be the second solution. Even a mis adjusted TPS will idle normally and not have the wondering/vacuum leak idle.

Edit: For future diagnosis, turn off the radio when recording. No one wants to hear your radio when trying to listen to the engine.

[mostdopes13]

boost or vac leaks