Rough idle, car shuts down under 1000 rpm... ive been searching and think its either my 02 sensor, wastegate, or BOV. Problem is I dont know how to check these parts to see if they are working properly. Again, this is my opinion. Any other ideas? Thanks.

 

boost leak/blow off valve combination

 

are you using the fic?

 

engine management? is this a sudden issue or recurring?

 

deff need more info bro.

 

check couplers and check all of them i had this problem and i scan my car had 4 miss fires and my o2 read replaced my o2 well replacing it seen a coupler right by the inter cooler was off and that was the problem the entire time

 

Ok, heres the 411. Im currently using a AEM FIC tuned at Churches Automotive, boosting at 8, have stage 2 cams, pistons, rods, turbonetics turbo that happens has an exhaust leak on the flextube located on my downpipe next to the exhaust manifold. Dont believe it causing the issue though. This issue happens everyday all the time. Its super anoying since I have to keep playing with the gas pedal to keep my car on. All is fine when Im driving and boost has no problems. No lost of power or miss fire when in gear. It only happens when I put the car in nuetral or when the car drops below 1000 rpm. Sometimes it takes 1 to 2 minutes restart the car when it shuts off. The car seems to smell very rich after shut off. Ive had this issue for about a year now. Took it back to Church, they could figure it out. Took it to a performance shop, couldnt figure it out either. Need help please. Thank you!!

 

check couplers and could be bad maf sensor

 

I've checked the couplings. Everything is connected and sealed. How do I check the 02 sensor to see if its bad?

 

i have similar issues, but mine are hit or miss. sometimes it drives fine, almost like stock, but then other times it will idle hunt and eventually die. sometimes it even just shuts off. it only really gives me trouble in the most inconvenient of times lol.

i really think it is something with the fic, cause it happened with my supercharger setup too. i have the resister mod done to the aem "plug and play" unit and only get cam/crank codes on start up and then they stay off once cleared. do you have any check engine lights?

 

bov is leaking at idle. tighten it if possible check to see if it is seated correctly.

 

that is ofcourse assuming your car vents to atmosphere.

 

My BOV is recurculated

 

do you know your fuel trims? do fuel trims when this happens jump back and forth between a positive value and negative value? do your afr's bounce back and forth between rich and lean? does the car start fine when its cold?

 

mine did the same thing, unplug your MAF see if it runs right. YOu will have to crank it two times it will die the first after you unplug it

 

my afrs do bounce around when this happens