Has anyone played with Mivec at idle to calm down aggressive cam? I have Cosworth 272/272 in my Evo 9. I tried to increase overlap and the car just idle worse. I was thinking about retarding timing and increasing overlapping?? Has anyone else had better results?? The idea is to get rid of the CE light..

 

I have the GSC 280's and my idle is just as smooth as stock with the intake cam set @ 0 from 500-1000rpm. I did advance the timing to 16.2 to see what kind of effect it had, all it did was add more lope to the idle.

 

i'm gettting miss fire code. Maybe I should try retarding timing?? What RPM are you idle at??

 

I run these with 9* of ignition advance and with 0's in the idle cells on the VVT map and it's pretty smooth (just a tiny bit lopier than stock). No trouble codes.

If you do this and still experience a very rough idle, you may have injector scaling/latency issues to resolve. Check your "O2 Feedback" trim at idle as a start.

 

You can also crank up your target idle some to compensate. Like PD1 said increasing idle timing will help. You cant actually retard the intake cam as 0* is all the further back it goes.

JB

 

email me your map, i'll fix the idle... Its an easy fix

autounionag@aol.com


Cheers!

 

I'm going to try fix it first myself because I'm try to learn this software. I've tuned with AEM but this is completely different because I'm used to PSI and not (Engine load %)

This help is greatly appreciated.

 

np man anytime!

 

subscribed...

 

Mike, feel free to call me bud!

 

anybody resolved this problem ? I have similar config, but idle in range (990 - 1050) and idle no smooth

 

Increase timing at idle (10-12° for example) with no MIVEC overlap for a smoother idle, I have the Cosworth M2's as well and hey can idle pretty smoothly.

 

I had tomei 280 and it was like stock with aem v1 but my cams now are very hard to tame

 

mivec can be set as low as -1.2 deg. every bit helps for big cams.