I have this issue w/ my car when I stop at a light my A/F gauge will run lean and the car starts to sputter a bit. My gauge reads normal through out all my driving, and it doesn't just run straight to lean when I stop, it stays normal between 14.7 / 15.4 ish, then it just tumbles lean. What the hell could be wrong? I am flashed by AMS.

Here is a small vid of it. Mind you, when it dips lean that one time, it does that quite often when I am idling. And yes, that is my car shaking. Thanks for the help.


http://s35.photobucket.com/albums/d1...rrent=IDLE.flv

 

I don't know for certain but maybe the air fuel issue is caused by vacuum leak. my car had an idle dip and would stall without throttle. This was cause by a vacuum leak, it only happens when my car is on defrost :\ so i have to be driving to defog my window . check for a vacuum leak maybe between the throttle body and maf.
edit- just checked your video and its not at all like my problem :\ where mine would drop and stall your drops and goes back sorry bud i couldnt help you should have checked the vid first .. doh!

 

Yeah, I can't even run my A/C. Car just wants to die.

Car runs fine, when I come to a stop, everything is fine for a second, then it just dips real lean, regains itself, and does it again. I have cams, etc. but again, I am flashed.

 

Have you recently disconnected your battery. If so car needs to relearn for a few driving cycles. My car does this all the time after a battery disconnect then in a day or two its peachy again

 

Mine started doing this on Saturday. I got cams installed on Friday and retune on Saturday. Check engine light kept coming on to. Reset ECU and SES came back on less than 50 miles later. Then I changed my plugs which only had about 1500 miles on them and reset ECU again. Started rough but in the last two days has gotten drastically better.

 

you can adjust your idle screw a bit, to bring idle higher

 

What are your mods ? Do you run meth by any chance or wai ?

 

I change my plugs at every oil change. It can't be that. Battery has never been disconnected, and I am not running meth. Only cams with all the supporting mods .

 

i have the same problem you have, do you have the hks rs intake by any chance?

 

^^^^^ I do. But this is not an issue during summer months, only when it gets cold out.

Could this be caused by a vacuum leak or an exhaust leak?

 

 

My car was doing that on stock cams , just some bolt ons. when my TPS was not positioned right. I took apart my TB to replace the shaft seal which were leaking and the TPS was not on right. what BOV are you running and is it vented? lol start with the easiest thing and work back.

I would guess it is a vac leak of some sort. But how does the car respond under load?

 

my car does that also. i think it might have something to do with venting my BOV to the atmosphere. at least thats what a couple people have told me. but i am also running without a tune since it is near impossible to get anything in Hawaii.

 

have you tried cleaning the throttle body and checking the ISCV

 

What was the answer here? i have the same issue with my car!