OFT Pops and Crackle Tune just stops working after a while?
 

Not really sure what's going on here, but I have the V1 OFT with the Stage 1 tune on it and have retarded the valve timings at the lowest settings as well as changing the fuel cut threshold to 6000 and get pops and crackles with my car (used the mod linked here: http://www.ft86club.com/forums/showthread.php?t=61069). It works great for about the first few days, but then all of a sudden it just sort of...stops? Usually around 3,800 to 4,200 RPM is where I can get those nice pops, in rapid succession too. For some reason, after a few days, I'll be in the exact same place (there's this one hill close to where I live with like a 10 degree decline that is PERFECT for a super long ride down the RPM range, crackling and popping the whole way) giving it the exact same amount of throttle, and it just barely makes any noise? After running with this tune for almost 2k miles now I know how to trigger it almost on command, so I'm assuming it's not user error with the throttle. The only way I've found to fix it is to reflash the tune, then it goes back to popping every time I tip the throttle. It's almost as if the tune is learning over time. Any ideas?

sounds strange, all you need to alter is ignition timing base B table.


been doing those tunes for years no problems


see if your ltft goes way positive at idle if so you might have exhaust leak or intake leak

OFT Pops and Crackle Tune just stops working after a while?
 

I’ll give it a try. Will update you tomorrow (it’s nighttime here and don’t want to wake the whole neighborhood lol)

And what numbers should stick out when I’m looking?

ltft should be below 10%

Yup, LTFT is below -7%. Seems to be intermittent enough that I can't put my finger on what I even think it could be. Any other ideas?

have you only got ignition retard in lowers load column ?


if so try putting some retard in second column as well


start retard in first load column at say 2400 rpm and second column 3000 rpm

Yup, have the timings retarded to -9.6 (or whatever the rounded 10 value was) from ~2000 to ~5000. Should I be going for a triangular pattern to the right of the map for this? Like a ">" shape almost? Or stop at the second column?

P.S. I understand the basics of retarding the ignition timing, but my novice mind would think that retarding the second column as well would cause almost like an overflow scenario? Where like there's simply too much fuel? Not really sure, I'm learning as I go here haha. Thanks for oyur help so far btw man!

stop at second column
put -6 in second column from 3000-5000

DEAR steve99



thnx alot for your help



but can u show me a screen shot what row i have to change



thnx

just one table Base timing B


similar to below


don't go all the way down to 800 rpm stop at 2400


you can make it simple and put -9 in 0.15 load column 2400 and above


then -6 in the 0.2 load column from say 3200 and above




http://www.ft86club.com/forums/attac...1&d=1506446738

thnx steve


but this would work with stock exhaust??


this is cal id ZA1JA01J
i try to use oft stage 1 map but car not runing good at all

i re flash stock romdownload it from your http://www.ft86club.com/forums/showthread.php?t=62332




thnx

Reflashed the tune and those sweet sweet pops and burbles are back to normal. Maybe it was just something wrong with the flash? Not sure, will come back and try what you said if it happens again. Thanks for the help and advice man! :thumbup:

Pop wont work on stock exhaust, you need catless header and a catback for them to eork.


Car should drive fine, just stock exhaust too quiet for pops


If you flash stock map or oft tunes you need to have stock injectors and map sensors and preferably stock intakes