vacuum leak?

 

nope... i dont understand. its not every time it does it either just most of the time.

 

ok here is a video of my problem lol. the first is afr and a lot of the time it will drop to 10.0 and climb even slower. the second one is rpm and it dies for a sec :l

http://www.youtube.com/watch?v=mfIlycHTQNs

http://www.youtube.com/watch?v=iUducPIrTuE

any help would be great i have been trying to solve this for a while have tried plenty of things in ecu flash.
thanks for taking a look

 

My bet is ISCV values, pegged fuel or ISCV trims, or gunky throttle body plate. Those are just my guesses though. Are you manual? can you mail me your rom?...meh, better yet I'll post my values.

The one thing I am not sure about is the "in drive" one. It's unclear what that does, but judging from how my car acts atm, it may be startup related or something, because after using these (stock lancer) values, it sometimes has trouble staying running when starting. So...the middle one might need to match the "A/C on" one.

 

my iscv values are a lot higher then yours.... if i lower it that much it wont even idle.

 

I had the same issue Burner it would die right away the first time I tried using Horns settings. I had to adjust my BISS about 3 turns before it would idle. I used the ISCV trims and the BISS adjustment actuator test in evoscan to get it better. I still cant shake my idle dips (still need to buy new plugs hopefully will fix the issue) but it hasnt dipped bad enough to die for quite awhile now which is a plus for me.

 

so which ways does turning the biss screw effect idle? and its the one with the plug cover on top right?

also what is there to know about the biss adjustment actuator

 

ahh so i searched and tried the evo settings and biss adjustment sure it worked but it still bogs and gets rich and all the crap it was doing earlier so no help there....

i have a hunch its the evo 9 DV...

 

Do you have the ISCV Trims as a loggable parameter in evoscan? Hornstar posted them in my thread I tried finding them last night but wasnt having much luck for some reason. You can try logging those and adjusting biss until your trims are as close to 0 as possible.

 

If you set BISS adjustment mode on, then turn the BISS screw (looser makes it idle higher, tighten makes it idle lower) until it sits at like 700rpm, the ISCV trims should be near 0 assuming they are the proper values....which I am sort of guessing on. The tables appear to be backward in our rom.

 

Using evo iscv values and evoscan i dialed iscv to be close to 0 at idle. didnt help the whole dip thing tho. at all.

i did fix a rough and gurgley start up tho about 4 days ago by adjusting my 11v injector latencies lower

 

still dipping horribly and still cant figure out why. and like i said its not all the time either its just after high revs when im stopped or just randomly after coming to a stop

 

Is it independent of AC being on/off?

 

hmmm ill have to check that^^^

lol I raced a toyota sequoia today legally of course and i had my snow tires on which are pretty skinny and it was pretty moist out so i couldnt do crap from a stand still but it was nose to nose till about 70 it was like i was just walking away lol 14psi

 

Haha it was quite an epic race, My sequoia, is rwd, studded tires and about 350 hp and 385 tq
It was a little wet out but we did race from 0-60 and a rolling you kicked my ****!
-slimthug