how to set decel fuel cut?

Civic VTI-Turbo · Post by **Civic VTI-Turbo** » Wed Mar 25, 2009 2:40 am

I have a cal + log from a B18c. The problem issen't decel, but if you decel and you hold you foot a bit on the trottle(with 1% tps) than the problems start. It's hard to explain it My English is a bit rough

I'll post it up tonight.

Post by **calvin** » Wed Mar 25, 2009 8:49 am

red_zone · Post by **red_zone** » Wed Mar 25, 2009 9:25 am

calvin, I sent you an email

98vtec · Post by **98vtec** » Wed Mar 25, 2009 10:52 am

greasemonkee wrote:The problem I'm seeing is a cyclic leaning action, but too lean to burn properly and smooth. Fuel isn't cut, but not fully engaged - somewhere in between. Strange thing was the injector DC was showing more than what would have been necessary to achieve +19:1 afr. Calvin, I really appreciate you looking into this; I'll drop you a mail.

is your throttle plate and TPS sensor calibrated correctly?

greasemonkee · Post by **greasemonkee** » Wed Mar 25, 2009 12:03 pm

Absolutely. Just as Civic VTI-Turbo explained, my problems are that also, but is really dependent on engine temp, and barometric press/elevation. Hopefully Calvin has found the solution now

Post by **Bugermass** » Wed Mar 25, 2009 12:56 pm

that why you must set TPS to 0% AND make sure its calibrated just right..

Civic VTI-Turbo · Post by **Civic VTI-Turbo** » Wed Mar 25, 2009 3:25 pm

Here's the cal + log Please log at Log1(zip file) 13:53 Here you can see, fuel cut flashing on and off.

Post by **calvin** » Wed Mar 25, 2009 4:22 pm

did anybody try the new update i have send to people? who needs it more?

red_zone · Post by **red_zone** » Wed Mar 25, 2009 4:34 pm

what I have to do to download the update that you speak of?

Post by **Bugermass** » Wed Mar 25, 2009 5:08 pm

Civic VTI-Turbo wrote:Here's the cal + log Please log at Log1(zip file) 13:53 Here you can see, fuel cut flashing on and off.

Looking now so I can see whats goin on here.. I never have this issue. Gimme a few to check over it.

Post by **Bugermass** » Wed Mar 25, 2009 5:21 pm

Ok your having the bucking issues when above VTEC, I see your problem.. go to 00:39:42.864 in log 1506.. Your map values are spiking from 160 to 212-222 while on the VTEC lobe. You have your Mbar set to 212, so its gonna cut in and out of fuel cut.. You either need to set your fuelcut Mbar to like 230 or so, OR you need to set your VTEC minimum load to 230mbar or higher .. Theres nothing wrong with eCtunes fuel cut in this instance..

Post by **Bugermass** » Wed Mar 25, 2009 5:21 pm

who else is having issues, send me your cals and logs so I can pin point the problem..

Post by **Bugermass** » Wed Mar 25, 2009 5:28 pm

darkb16a1 wrote:Ok, attached is a darkb16a1.zip file. It contains the following files: basemap.cal - my actual basemap fuelcut_minus70.elf - a pull on 3rd gear with no throttle, and with fuel cut set to -70mbar fuelcut_minus70againslightthrottle.elf - a pull on 3rd gear with no throttle at the start and then slight throttle to see how the pressure values change when on slight throttle. again fuelcut set to -70 fuelcut_170_slightthrottle.elf - a pull on 3rd gear with no throttle at the start and then slight throttle, with fuelcut set to 170 mbar. Here you can see that the mbar values at no throttle and very gentle throttle(3-5% of TPS) differ in very small values, and the car starts to pop(a few attempts of fuelcut while being gentle on the throttle). fuelcut_origsettings.elf - a pull done on original values. 200 mbar / 5% TPS. My biggest problem is that I set the mbar values either too high and then the fuelcut comes in play even when being gently ON the throttle, or I set it too low and then it doesn't properly do the fuelcut while not being on the throttle at all.

Set your fuelcut mbar to 200 and TPS threshold to 0 and try again..

Post by **Bugermass** » Wed Mar 25, 2009 5:31 pm

racepak wrote:log:

This log is useless.. take another log of you at idle, then you driving and deceling with a current version of your map and I'll find your problem..

Post by **Bugermass** » Wed Mar 25, 2009 5:31 pm

I can tell you right now 149Mbar is way to low.. Post logs..