The problem I had running a higher response time was higher fuel trims on the fi/c while in boost. When I was running 5 psi with 550cc injectors I was adding up 74% fuel and found I was running out of fuel for only 7psi because I was adding 99% fuel with 550cc injectors.

 

I was running high level drive for almost 6 months

The stalling isnt fixed by running high level drive, it just happens to be that your map works better in that area.

The best way to fix the stalling is to tune the idle region of your map and remember to tune the boxes around the area for the same settings.

Best thing to prevent stalling... downshift 2nd best move is recirculating the BOV

 

Yes there a few ways to diminish the stalling, and downshifting is one. Injector time is another, but tuning is the best way.

Remember the FIC much like any other engine management takes a weighted average of say the cell it's on and the surrounding four. Keep this in mind.

 

Ive been playing with my vacuum tune and i have the idle area all -42.2....wat do u suggest i do so that i dont need to change response time? Like how would u fine tune that area?

PS imma take the pictures of the clutch for u today Paul

 

There is no no real correct answer as far as to what is right! The car will let you know what it needs and what it likes and doesn't.

 

If ur fuel trims were higher all u have to do is go to the fuel map and lower them down a bit, it's as simple as that. That's of coarse if u have a scangauge

When I was fine tuning, every time I messed with the O2 map the fuel trims would go out of whack, I fixed that by adjusting the fuel map a bit and getting it down to zero. I have a 45 miles commute to work, it gives the long term fuel trims plenty of time to level up.

 

is anyone experiencing something like i guess a hickup, lol

when flooring it for example at random times the car would stumble, to me it looks like when i WOT it dumps fuel and drowns itself and then recovers .. just my opinion on the process. Anyone with ideas ?

P.S. sorry to thread-jack.

 

^ Your adding too much fuel in that area do you have a wideband ? if so what is it reading.

 

yes actually i am running rich.. it eather says rich or goes to like 10.1

 

same thing happening to me as well, stumbles and goes extremely rich at 10.0, i let off and give it gas again and its fine again

 

When does it stumble say under 3k ? I noticed a lot of people who are running 57-60 trim turbos which spool up around 3500 - 4000 rpm running maps that start adding alot of fuel around 3k. Probably because they are using fuel maps running a 50 trim which spools up much quicker.

 

Around there, it stumbles mostly under WOT at around 3k and up, I know for a fact 5th gear is a pain for me personally if I am WOT in 5th because it will constantly go rich and stumble and I would have to let off and get back on until it does it again shortly... I'm going to the same guy that tuned my bro's supra this Saturday and he claims he can fix both the stalling and stumbling issue, so we will see...

 

^ who is that nrgtech ?

 

nah this unaffiliated tuner Brian aka Chevyeater on supraforums... hes somewhat worshiped as a god over there and from what i see on my bros car, his tune was immaculate... he also tuned the westbury scion turbo tc and got it running like stock... ill update after this weekend, hopefully he is all that hes cracked up to be

 

That is acceleration fuel, which the stock ECU throws in to cover the additional onset of TQ from the HUGE TPS change

 

told ya' No Limit sucks

 

Wow, and i remember you guys liked no limit when someone here got tuned by them and then few more guys. Wont they adjust the tune ?

My tune ProTech has no problem with adjusting the tune.. i just have to log what the car is doing with FIC and send it to him.


Paul, so what are the tips for my tuner so he can 100% get rid of this B.S. behaviour ?

 

It didn't always stumble this much, when I first got the car back it was only doing it in 4th gear very rarely... and only if I was doing a 4th gear pull WOT... After the install of motor mounts, clutch, flywheel, front and rear sway bars, its been acting up more and more and I can't seem to find the problem...

well hopefully we get a response soon...

Watching.

 

To make a long story short, I met with that tuner that is worshiped over on supraforums today and had him take a crack at fixing my stumbling issues and stalling issues, rented 1 hr of dyno time at NLMS using their dyno dynamics dynamometer and fine tuned on the streets.

End result:

Stumbling issue.... GONE
Stalling issue.... NONEXISTENT !!

After all tuners and all the advice and arguments as to whether the issues were caused by the BOV or tune, the answer IS the tune and tuner knowledge, so happy my car is running smooth as stock right now :D

 

can you ask him whta he adjusted and what he was looking for as far as stumbling ?