Crappy Idle After Installing Bigger Cams
dead thread coming back alive,
how did you sort it out? i just installed cams on the evo and it wont idle at 1000. Cant seem to raise it up at all. No boost leaks at all.
I can drive it around but the minute i stop, it just dies.
how did you sort it out? i just installed cams on the evo and it wont idle at 1000. Cant seem to raise it up at all. No boost leaks at all.
I can drive it around but the minute i stop, it just dies.
i would like to see that too!!! same thing here too!!!
Evolving Member
Joined: Sep 2008
Posts: 318
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From: Czech rep.
I had similar problems - fluctuating idle and dying engine after stopping car.
What helped me was - start the engine, let it idle with no load for about 10 minutes, then switching lights on, A/C on, rear window heater on and let it idle for another 10 minutes.
Seems like ECU had to learn new idle throttle plate position to work. I do this every time after I reflash ECU.
What helped me was - start the engine, let it idle with no load for about 10 minutes, then switching lights on, A/C on, rear window heater on and let it idle for another 10 minutes.
Seems like ECU had to learn new idle throttle plate position to work. I do this every time after I reflash ECU.
I had similar problems - fluctuating idle and dying engine after stopping car.
What helped me was - start the engine, let it idle with no load for about 10 minutes, then switching lights on, A/C on, rear window heater on and let it idle for another 10 minutes.
Seems like ECU had to learn new idle throttle plate position to work. I do this every time after I reflash ECU.
What helped me was - start the engine, let it idle with no load for about 10 minutes, then switching lights on, A/C on, rear window heater on and let it idle for another 10 minutes.
Seems like ECU had to learn new idle throttle plate position to work. I do this every time after I reflash ECU.
Scroll back to my previous posts, in summary:
Add timing advance in the 500-1500 rpm range 0-60 load areas
Change base target idle values 100-200 higher so that no tables have lower values than desired
Add a few percent to the TPS tables in the idle areas
Make sure your MAF was calibrated properly before the cam install and that STFT and LTFT's aren't indicating your car is out of adjustment range
Make sure you are using proper timing advance tables for the ECU ROM in your car, 2011-2013 timing advance is much higher at idle where as 2008-2010 roms have advance in the 10-12* timing range. if you try and use the 2011+ elevated timing advance in the earlier model roms it will run poorly.
MIVEC tables can be adjusted for less overlap to avoid leaning out at low loads and rpms
Add timing advance in the 500-1500 rpm range 0-60 load areas
Change base target idle values 100-200 higher so that no tables have lower values than desired
Add a few percent to the TPS tables in the idle areas
Make sure your MAF was calibrated properly before the cam install and that STFT and LTFT's aren't indicating your car is out of adjustment range
Make sure you are using proper timing advance tables for the ECU ROM in your car, 2011-2013 timing advance is much higher at idle where as 2008-2010 roms have advance in the 10-12* timing range. if you try and use the 2011+ elevated timing advance in the earlier model roms it will run poorly.
MIVEC tables can be adjusted for less overlap to avoid leaning out at low loads and rpms
Last edited by Hiboost; Jul 11, 2013 at 07:13 AM.
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