eg6turbo

well like the topic says i have a problem with my tuning where as soon as vtec kicks in at 4900k i get this popcorn popping sound and car hesitates a lil...i tried retarding the btm but **** still wants to make popcorn...i tried richening up the vtec point and this just started happening out of nowhere...i have new plugs gapped at .30 440cc and afc with dyno tuned settings...any other advice...gas is shell 91 octane...could being too rich cause the mis-fire???

R6Elmo

what is your base timing set at. and what is your afc set at?

B94Cast

Being too rich will cause an almost "splattering" effect... if you are hearing high frequency sounds... then bad. But if you are hearing sounds like your engine is splattering all over the place, then I would try leaning out a bit. What does your AF gauge read during this stage?

eg6turbo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R6Elmo &raquo;</TD></TR><TR><TD CLASS="quote">what is your base timing set at. and what is your afc set at?</TD></TR></TABLE>

my base is set is at 16º and btm at about .33 retarded...i tried leaning it out a lil still same ****....im going to hook up and fmu and see what happens...i also have a walbro 255lph fuel pump already...

EGtoDC2

have you set the vafc to the correct size injectors? sorry to hear this, makes me scared to go VAFC (apexi, right?). I'm gonna use mechanical fmu on my setup until i can make trip to nearest honda tuner (4 hours away).
I like the VAFC (especially the rare black types) that apexi puts out, heck i was thinking of gettign the SAFC until i realize hondata roolz.

Cee_mon

maybe try a high octane gas??? I run only 94.

p0gi

Looking at your dyno plot , which its kinda hard to see, but it appears that you are running lean. It looks like your a/f ratio is around 13 from 4900 and gets worse as the rpm's increase , getting up into the 14's . I would say you need to richen it up a bit.

SOFLSOL

440, afc, and walbro you should be rich as ****. What are your afc settings? Mine are all in mid-upper 30's and still smokingly rich.

scttydb411

try higher octane.

BoostedITR41

I used the hack at 11psi and it detonated. I switched to the FMU with 450's and I run 1 bar daily with 0 problems so far. ohh this is with no BTM and base timing at 13 degrees. the hack makes the ECU go full advance. if I were you I would get the inline pro head gasket and block gaurd and run 1 bar with the missing link and FMU....ohhh by the way it is easier to tune

eg6turbo

THE DYNO I DID WAS WITHOUT THE INJECTORS AND VAFC....I HAVNT POSTED MY NEW SHEET YET...IM GOING TO GET 100 OCTANE GAS FIRST TO ELIMINATE ME HAVNG A BAD BATCH OF FUEL...OTHERS SAY THAT I HAVE A BAD CARBON BUILD UP FROM RUNNING TOO RICH ALL THE TIME AND THE CARBON BUILD UP IS PRE-IGNITING THE FUEL AND AIR...IMMA TRY HE GAS FIRST THO....MY SETTINGS ARE
1K -23
2-4K -38
4.5-5.5K -31
6K-8K -32

BEEN RUNNING LIKE THIS FOR SEVERAL MONTHS WITHOUT ANY PROBLEMS...ALL OF A SUDDEN IM HAVING THESE ISSUES....IM NOT STUPID WITH MY TUNING JUST CANT FUGURE OUT WHATS THE DEAL...

99lspwr

Its all in the tuning bro,,,,people who say the hack sucks, are not using it correctly or having someone tune it that does not know what they are doing..Unless you go full standalone, vafc/safc is 10x better than fmu,missing link,blue box or whatever other cheap fuel management people are using..I know because I have wasted wayyyyy to much$$$$ on all of the above...Just get someone to tune it that knows how to tune your car...Its been done plenty of times before...Good luck..

eg6turbo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99lspwr &raquo;</TD></TR><TR><TD CLASS="quote">Its all in the tuning bro,,,,people who say the hack sucks, are not using it correctly or having someone tune it that does not know what they are doing..Unless you go full standalone, vafc/safc is 10x better than fmu,missing link,blue box or whatever other cheap fuel management people are using..I know because I have wasted wayyyyy to much$$$$ on all of the above...Just get someone to tune it that knows how to tune your car...Its been done plenty of times before...Good luck..</TD></TR></TABLE>

thanks for the advice but its not that im doing anything wrong....everything seems to be werking the way its supposed to but still it hesitates and makes a popcorn poping sound...i retarded it 1º per psi and still makes the same noise i advance it still makes the same noise...adter i throw in 100 octane we will see...but keep the suggestions coming...

shermanyang

iTrader: (1)

what plugs are you using? maybe preignition if you're not running colder plugs or gapped .028-.032. also try messing with your vtec engagement point. try raising it a bit...that's what i've seen people do at dyno's, cause when vtec engages there's that little dip in the power curve...and on turbo'd cars, that dip is multiplied. just trying to suggest different things...i could be way off

eg6turbo

im running the bkre7 gapped at .30 with full msd ignition and btm...will get 100 octane gas on wed..i have a full tank of 91 76 now...ill try vtec at 5.5k or 6k

Quade

Reset your ecu. Let me know.

joek84

why would the hack cause the ecu to go full advance? would getting an o2 simulator fix this

Distorted

Set the BTM to 1 degree retard for each lb of boost. This is a standard starting point. Make sure you timing is stock. Gap your pluges down to 26-28, make sure they arent platinum(it retains heat at times and cause predet). Thi should solve the problems. If not message me. I've delt with this before and got depely into how the whold system works with voltages and problems that occur. Its a good set up, but can be hard to understand. Also, for the most part, FMU's are horrible. Not all, but most. All it does is increase pressure...so but a fuel pressure regulator if your worried about that, you need volume with a turbo.

eg6turbo

well 100 octane did it...fixed the problem...will start my build up as of today...im going to fully build a d16z6...darton sleeves je pistons and pauter rods...should be done in a month...

racinskittle

Good to hear