Is your CL Idle Hit or Miss?

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09-09-2015, 10:08 PM

#21

DNMakinson

Retired Mech Design Engr

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I am running with idle valve left open (not closing after some time). I did, as you cautioned, see that, upon a throttle lift with clutch pedal depression (like a shift, or going to coast to a stop), with "0" in the delay, CL would immediately engage (which makes sense, as the RPMDot, MAP, and TPS were all in range for a split second). Never had a drivability problem, as the CL would still bring idle gently on, but I did not like the lack of consistency.I added back 1 second on the PID delay and that fixed it so CL didn't make that immediate activate, but waited for the dashpot settle. However, I left the PID Ramp to Target at "0" with no issue, so the pause in deceleration is nearly imperceptible.

12-30-2015, 10:07 AM

#22

dwink

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Quote:

Originally Posted by jtsoldier

Oh my ******* God...

Between DNMakinson's posts (including switching to MAT initial duty table from last known good) and richyvrunlimited's guide (actually, I googled the original just for readability's sake - credit to Mr Slow) my idle just automagically turned from being a surging piece of **** to something gloriously reliable (exaggeration: PID could still use work).

Put some time into cold starts idle duty the following night (it's winter here), and managed to get that quite reliable too.

May of killed two very big birds.

Cheers guys.

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