Fuel cut not working above vtec switchover point

ninezeroteg · Post by **ninezeroteg** » Sat Oct 10, 2009 11:33 pm

Fuel cut seems to work fine while I'm in low cam, but it didn't work in vtec until 600 msec's after my RPM's dropped below 5200, which is my vtec switchover point. Is this the way it's supposed to work or is there something wrong? Had an issue with vtec cycling in and out at a high rate as well because my vacuum kept dropping below 90mbar. Could a bad PCV valve cause that? Not sure, but that's my issue, ectune was doing it's job there.

Post by **Bugermass** » Sun Oct 11, 2009 4:42 am

set VTEC Mbar threshold high like 700+ that way when you let off the throttle in VTEC it'll go back to low cam and you'll get your fuel cut.

ninezeroteg · Post by **ninezeroteg** » Sun Oct 11, 2009 7:03 pm

Ok, vtec minimum mBar set to 698. This takes care of the problem with vtec going in and out at high vacuum, but fuel cut still isn't happening for like another 8 seconds.. All of the criteria is there... Fuel cut is set as follows: Below TPS: 2% Below Load: 193 mBar Above (minimum) RPM: 2000 rpm Fuel Cut Restore Below: 1800 rpm Fuel Cut Delay: 600 mSec You can see that I was at 0% TPS, but no fuel cut. Even when I dropped below 198 mBar, still no fuel cut. It does go into fuel cut for a split second at 2:25.753, but goes right back out for another 720 mSec. I noted that the lowest mbar was 120 during actually fuel cut, so I've set my first scalar at 100mBar. I'd like to get my tip out fine tuned, but want to make sure my fuel cut is actually working right first. I checked for updates, and I'm running the latest version.

Post by **calvin** » Mon Oct 12, 2009 4:32 pm

i'll test it shortly i did.. on one car it worked on the other not... not sure why. when it worked on the last car i didn't look into it anymore.. I'll focus shortly on this.