slickfx3

they have rpm entry's what does this do?

RBob

iTrader: (1)

Head up to the Tuning Guide Book, chapter 5, '7730 ECM. There is a stall saver thread there that explains this. The same logic is used in the $8D mask as the $6E mask. So the explaination covers both.

What is done surprised me as I am used to stall saver retracting the IAC. Which in this case is not done.

RBob.

slickfx3

thanks, so much to read... i shoved the rpm's down on those entry's( approx 100 rpm's), and on loads introduced at idle i.e. ac enabled, etc, sometimes the idle would destabilize and oscillate, and when the amplitude gets too large, and ranges 500 rpms above and below from my setting (850 at operating temps ), it can at times stall,

I upped these and the dying/stalling diminished converse to your remedy.

so i was under the impression, this was accomplished by pulling advance, did'nt even thought to think the iac would be programmed to leak more air, my guess was the iac is just too slow to react.

so, you zeroed these entry's....,

why would the engineers put this function in in the first place, and is zeroing a proactive manner to address idle yo yo, that results in stalls? and my raising the threshold is a mistaken solution?

RBob

iTrader: (1)

What lead me to this stall saver function was an issue on a stick shift car. When pulling out from a stop if the RPM dipped a little, which is common, the engine would stall like the key was turned off. Just instantly dead. It would fire right back up, but it still stalled.

Finding that it reset the distributor back to base timing by activating the BYPASS I disabled it by setting the RPM values low. Problem solved.

Since the stall saver feature switches the distributor back to base, the actual base setting will affect how the engine reacts to this feature. A higher base setting may also have cured the stall on this particular car.

RBob.

slickfx3

well in my case i never had the luxury of the idle dipping on take off, between the cam, lost inertia of the singlemass flywheel (18lbs lighter than DMF), , i would have to always feather the gas and the clutch pedals at a higher than idle zone to achieve a non-stall take off ( another argument for a auto, which i miss, but when the car is allowed to wail, the stick is a thing of beauty) but stall enough daily anyways.

the stock l98 with tpi's torque spoils the stick driver with this type of inattentive take off, while, take off is the most frustrating event to me driving my car.

so the loads im experiencing will somehow yo yo the idle, and i suppose that is when the iac a opening up and closing and and when the idle drift south past the cam's ability to maintain minimum air it triggers base idle as per stall saving, this does seem to work as when i watch it , it will taper off and center to the set idle, if it does not stall first. my theory....

furthermore, the 3 tier ( i saw it again and it specifies "spark" no wonder i didn't think IAC) would lead me to belive it is a progression of some sort and there is a disable rpm,