fuel cut tips

Support forum for eCtune software.

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honda16
Posts: 7
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Joined: Mon May 11, 2009 11:56 pm
Location: USA

Post by honda16 »

If I was to guess why MBAR jumps, it's due to less scavenging during overlap. With the cyl pressure at practically zero due to no combustion, there is no exhaust scavenging, and less air is drawn into the cylinder during overlap - so more air/pressure is left in the intake manifold. This could very well be another reason why tuner versions don't see this as much, as they may tune w/large overlap cams which don't have as much scavenging at such a low mbar/rpm. I haven't seen the options for a long time, is there \"hysteresis\" in the code for pressure? It seems like it's needed for a lower cut and higher reactiviation to deal with that rise in mbar after fuelcut.

DSMR
Posts: 124
Joined: Sat Dec 27, 2008 5:25 am
Location: North Carolina

Post by DSMR »

update: From my last post my car has changed alot; updates in the software, I replaced every seal and gasket in the IM to include that stupid screen in the IACV, Larger injectors, 4 bar map, turbo... After all of this I can say that fuel cut works fine now. I am not sure exactly what combination of the above fixed it, but I do know that I was having major issues with the FITV and after I cleaned it and put new seals in it, everything has worked perfect. I had a small issue at very light throttle with the car bucking in and out of fuel cut but I fixed this by changing the TPS% lower. So no problems at all with this so far.

Maddog20
Posts: 157
Joined: Tue Apr 03, 2007 3:52 pm
Location: Ohio

Post by Maddog20 »

well I got Fuel Cut to work!!! I ran Force Update again and put Base+Cal and now its working great! I mean it is seemless very nice! Thanks

combz
Posts: 199
Joined: Tue May 27, 2008 11:35 am
Location: canada

Post by combz »

haha calvin, don't buy a new car jjust to test lol.. unless you're coining it that much that you can do that ;)

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