how to set decel fuel cut?

Post by **Bugermass** » Thu Mar 26, 2009 10:12 pm

Civic VTI-Turbo wrote:
Bugermass wrote: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..
The Bucking really happens when he is driving in the non-vtec area. Low rpms... If i put the fuelcut mbar higher it gets worse. If i put it lower dan 200 than the fuel cut doesn't sets in.

The logs that he sent me didn't show this.. Mabey he posted the wrong logs.. Or mabey he needs new motor mounts lol..

greasemonkee · Post by **greasemonkee** » Thu Mar 26, 2009 10:15 pm

Whatever you've done Calvin, she's smooth as silk and very responsive now

greasemonkee · Post by **greasemonkee** » Thu Mar 26, 2009 10:39 pm

I wound up adding quite a bit of fuel in the first 2 columns in attempt to hold a 14.7 AFR immediately after the cut since it was going very lean. I had made this EXACT attempt a few months ago and there was no change in the post cut behavior. Now it works and I see the tps resume value working. Summary: first two columns require higher fuel values to maintain near stoichiometric fueling right after fuel cut as opposed to what would be 14.7 fueling with fuel cut disabled. On occasion I will see 11-12:1 AFR when winding down and out of fuel cut conditions due to this. I don't see this as a problem. Everything looks good to me at this point and fuel cut is very responsive and smooth. Thankyou

red_zone · Post by **red_zone** » Fri Mar 27, 2009 6:57 pm

hello,crhis take a look to my. cal,this is wiht default settings fuel cut.thank you for your help

red_zone · Post by **red_zone** » Sun Mar 29, 2009 7:11 am

hi, this morning I did a test with closeloop off and fuel cut off to adjust my map, but the fuel cut disable option does not work, and continuously hitting hitches in retention

Post by **Gaskleppie** » Mon Mar 30, 2009 4:37 am

Civic VTI-Turbo wrote:
Bugermass wrote: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..
The Bucking really happens when he is driving in the non-vtec area. Low rpms... If i put the fuelcut mbar higher it gets worse. If i put it lower dan 200 than the fuel cut doesn't sets in.

I cant find that point either. At what time did this happen? I can see this part were it is jumping in and out. I saw that you have 215mbar as fuel cut setting. Look at the mbar in the graph and you can see eCtune is not doing anything wrong. I thing the driver was pressing the brake what caused the rapid lowering in rpm and that pulled the vacuum a bit higher. Its just a car that doesnt pull a lot of vacuum off throttle...

Post by **Gaskleppie** » Mon Mar 30, 2009 4:41 am

red_zone wrote:hello,crhis take a look to my. cal,this is wiht default settings fuel cut.thank you for your help

Set your fuel cut mbar setting to 210 and you should be fine or at least a lot better..... Its funny to see that some cars are pulling a lot more vacuum off throttle then others.

racepak · Post by **racepak** » Mon Mar 30, 2009 5:40 pm

sorry for not uploading any cals, just sold my LM1 and i'm waiting for my LM2 so you wont see afr in my logs, but i assume you will notice it by rpm's, ill upload the files tommorow,

red_zone · Post by **red_zone** » Mon Mar 30, 2009 6:04 pm

can someone tell me something about my.cal?

Post by **Bugermass** » Mon Mar 30, 2009 7:29 pm

red_zone wrote:can someone tell me something about my.cal?

set your tps to 0% and your fuelcut mbar to 225 That will probably do it ..

red_zone · Post by **red_zone** » Tue Mar 31, 2009 7:06 am

thanks crhis,i will try today this set

red_zone · Post by **red_zone** » Tue Mar 31, 2009 7:10 am

Gaskleppie wrote:
red_zone wrote:hello,crhis take a look to my. cal,this is wiht default settings fuel cut.thank you for your help
Set your fuel cut mbar setting to 210 and you should be fine or at least a lot better..... Its funny to see that some cars are pulling a lot more vacuum off throttle then others.

thank you Gaskleppie the less vacuum should be the camshaft?

Post by **Gaskleppie** » Tue Mar 31, 2009 8:11 am

Can be. Higher cams and/or bad cam timing gives less vacuum @ idle. When you suffer bad vcuum @ idle, the chance of having a bad fuelcut is quite high.

red_zone · Post by **red_zone** » Tue Mar 31, 2009 5:41 pm

Gaskleppie wrote:Can be. Higher cams and/or bad cam timing gives less vacuum @ idle. When you suffer bad vcuum @ idle, the chance of having a bad fuelcut is quite high.

I have assembled some skunk2 pro 1, he have a low vacuum at idle, but while using crome pro had no problems with the fuel cut. I think as discussed earlier in this post, if we could only control the fuel cut with tps,may not have this problem. maybe with the new routine that Calvin has developed the problem is solved

red_zone · Post by **red_zone** » Wed Apr 01, 2009 5:52 pm

hello, I tried your sets, but I'm not getting any result follows more or less equally. I'm desperate to the subject because I have tried a lot of things and not get anything. there is something else I can try? thanks