OLSD feels awesome.. issue down low.

[waterbug1999]

Man, I got it in OLSD and the cars pulls pretty damn hard! AF is low to mid 12's (can lean it out some) at WOT and everything else is upper 14's AF, driveability is the best its ever been..

But, when coming to a stop/slowing down for a stop the cars RPM will dive to a tad above it stalls, then catch itself and come back to a nice purr after a few attempts.. Any tables I can tweak/adjust to help this??

[Tordne]

Throttle cracker and follower will be your salvation

[waterbug1999]

Throttle cracker and follower will be your salvation

thanks...


I smoothed out the lower portion of the airflow by some clicks..

Before:



After:




I saw I had no decay rate (i think we changed this way back when and forgot we had changed it), so I changed that.

Before:



After:



It seemed to have help, but I think its too much because the car pushes at 1500 rpm until I almost get to a stop then the RPM's come down to an idle and its fine.

So, you think If I up this to say 20 mph or so that it would fix it?

[drdarthinvader]

one other way to get good acceleration which i use is to keep the throttle cracker std settings and use throttle follower the as an accelerator pump. you can monitor the progression through scan -iac steps ...max is 199 also if you increase t.f you must increase the decay by the same percentage

[waterbug1999]

one other way to get good acceleration which i use is to keep the throttle cracker std settings and use throttle follower the as an accelerator pump. you can monitor the progression through scan -iac steps ...max is 199 also if you increase t.f you must increase the decay by the same percentage

Which graphs you talking about, B4321?

[SSpdDmon]

I always say - while the car is in motion, throttle cracker is for problems/adjustments you have/need after you've been off the throttle for a few seconds and throttle follower is for while you're in the throttle OR you just got out of it. That's why TC is RPM vs MPH and TF is based on change of TPS%. If you're coasting to a stop and see the RPMs drop at a certain point every time, I'd bump up the throttle cracker a touch where it happens. No need to go changing the thresholds that much. You're just taking one more element of control away from the PCM and it's ability to keep your RPMs in the right spot.

[waterbug1999]

I always say - while the car is in motion, throttle cracker is for problems/adjustments you have/need after you've been off the throttle for a few seconds and throttle follower is for while you're in the throttle OR you just got out of it. That's why TC is RPM vs MPH and TF is based on change of TPS%. If you're coasting to a stop and see the RPMs drop at a certain point every time, I'd bump up the throttle cracker a touch where it happens. No need to go changing the thresholds that much. You're just taking one more element of control away from the PCM and it's ability to keep your RPMs in the right spot.

When coming to a stop (just slowing down), the car is just ideling (and idles fine) till I get to ~10MPH or so then the RPMS go jumping around till I stop, then it cathes itself and its all good..

So, for that your saying I should go in the TF and not the TC?

[SSpdDmon]

When coming to a stop (just slowing down), the car is just ideling (and idles fine) till I get to ~10MPH or so then the RPMS go jumping around till I stop, then it cathes itself and its all good..

So, for that your saying I should go in the TF and not the TC?

No - more like return your B4311/B4312 back to stock and try fixing the problem in the throttle cracker airflow values (B4309) based on the speed/RPM that you experience the problem. Again - TC is for off-throttle airflow adjustments while the car is moving. TF is for "cushioning" on-throttle and throttle transition behaviors.

See my recent post about idle mode to get a little better understanding of what's going on once you stop. If you take that into consideration, it becomes a bit more clear that raising the B4311/B4312 isn't the solution. Doing that only removes an element of contorl.

[waterbug1999]

I do not know what the stock settings where... The tune was messed up from the tuner way back when, on B4313 they were all 0 and B4312 & B4311 were set at 412.

I copied the #'s (for B4313 and B4312/B4311) from some other tunes and started there..

Only thing I changed was B4309 a little down low.

[SSpdDmon]

What OS are you running? I assume it's for the car in your sig.?.? I might have a stock file that you can load as a "compare" file. Then, you can see what the original values were.