whenever stationary, cold start, traffic light etc. car idles terrible and reads low vacuum and air/fuel is all over the place sounds like car wants to die out but it never does. sometimes it idles fine for a little while.
looking for opinions on what might be wrong. took my car to a shop where they installed a map short runner, map o2 dump, walbro 255. i believe they might have reflashed a stock map back on but i dont know if thats the full cause of this.
after searching forums, narrowed it down to
-bad iac
-bad tps
-TUNE
-vacuum leak (they said they tested it with no leaks, but who knows)

included a video where its idling fine then i tap on gas and car vibrates more and runs funny, after a while it will idle normal again

http://youtu.be/emTCKE20udg

evo 9 41k miles
arc intake
gsc s1
stock turbo
map short runner manifold
map o2 dump
walbro 255
apexi avcr EBC
tanabe tbe
ets lp2 licp
stock intake manifold, throttle body, intercooler, uicp, injectors, bottom end,

thanks a lot

 

any comments or advice is appreciated

 

Sounds to me like a bad tune or maybe even leaky IC pipe or something.

 

Regular drivability is pretty normal

 

U ever get this figured out?

 

no lol just waiting to tune it and hopefully thats the problem

 

still open to imput

 

Could be anything, double check all your pipes and hoses, especially the ones you can't see. What bov are you using, and is it recirculated? Also what are you tuned with? ie. ecuflash or something else?

 

stock 9 diverter
recirculated
ecuflash

 

https://www.evolutionm.net/forums/ev...se-help-9.html have a look

deleted the EGR vacuum lines by looping the 2 vac lines on the top of the throttle body back into each other and presto fixed yeah! try it

 

thanks a lot ill try it

 

yup that worked perfect, thanks again

 

how many mile on your car?

 

almost at 42k
im wondering if looping the vac lines have any negative side effects though