Hey guys thanks for taking time to look at this.

ID1000 injectors, walbro pump, BBX Lite turbo, CBRD Tubular, AMS fuel rail, ETS Intake, fmic, upper and lower pipes, CNT exhaust, CNT catted downpipe.

all tuned

After getting the above installed and tuned I have been experiencing occasional / often erratic idle while @ stop.

It doesn’t happen all time but normally occurs when I am at full stop (e.g. traffic lights). The revs bounce all over the place from 800rpm down to 200rpm and sometimes causes the car to stall.

When I see this erratic idle about to happen, I normally give the car a bit of gas to prevent the stall (and embarrassment!). The plugs have been checked and my tuner switched out my relay to the blue one.

Recently I have been monitoring my A/F gauge and noticed that the erratic idle is normally accompanied by very lean readings (e.g. 17+ or “****” on the AEM gauge). When my A/F is 15 +/- the idle is perfect.

I've taken it back to my tuner but they can't get the problem to replicate. A little bit of daily driving in the car and it should happen @ least once but they couldn't get it to happen. Has anyone experienced this problem? Below are some videos of the cars idle jumping around. Within a 1 mile radius my car managed to stall out and show signs of erratic idle with strong sputtering from the engine during the erratic idle. Turn up the volume or wear a head set to hear the idle chirp.

[EDIT NOTE] I had ETS Intake, FMIC + U/L pipes and the CNT downpipe + exhaust before the tune and I never had this problem. So I don't think its from the fan turning on throwing hot air into the intake. Plus I have the heat shield on.

Never did I once accidentally hit the gas pedal turning filming, this was all within a 1 mile radius (about 3 minute drive time) at the jack in the box and sitting on front my house.

This was @ a stop in jack in the box drive thru. Notice car's idle jumps @ the very beginning followed by the car completely cutting off wth?

http://youtu.be/ySczP33DWRo

This is the most common type of erratic idle I get however its usually more drastic dipping down to the 500's. This was a minor one and what I managed to capture on film.

http://youtu.be/4wia68Putv8


Notice how the idle jumps up by itself. Also notice the AFR gauge.

http://youtu.be/WfalI4Sgk5w

 

What's your LTFT Idle and Cruise?

 

My recommendation is 3 fold:
1) Check your WGDC in the 500-1500 rpm X 10-20 tps
2) Check your MIVEC in the 500-1250 rpm X 10-20 load
3) Check your 3x's MAP/MAF tables
Remove any WGDC and/or MIVEC in these regions. This will help to stabilize airflow at idle. Create new 3x's MAP/MAF tables to account for the increased airflow; won't make a difference under 60 load, but will make life smoother all the way around.
Most tuners appear to modify fuel around stock VE tables (which suck btw). This why many fuel maps look aweful, but log as smooth.

 

I will write down both those questions and hand em over the my tuner on when I see them early this week. Thanks guys

 

Fuel Pressure Regulator Vacuum hose, check the stickies, it is a know issue. If you are pushing more boost it could have popped off.

 

^ this. If your seeing the wideband go lean, that's a good indication of extra air being pulled into the engine un-metered through the vacuum port.

 

First thing I checked was that hose it's intact and zip tied real good