Surging When coming to a stop- 10 MPH only

[BowlingSS]

I have a 2001 running COS5. Everything seems to be dialed in except one item. Most of the time after the engine is hot, when I am slowing down at 10 MPH I get a surge to 1200 or so and then back down to 850 idle.
My RAFIG is real close +- .2. I have changed the RAFIG to plus side and minus side. I have tried to increase my Throttle Cracker Table with no help. I have also tried changeing my Throttle Follower Table. Why I think it it is the Cracker table is I have it set to come on at 10 MPH.

I did notice yesterday with the AC on it was not as bad.

What does everyone think I should try next? It is getting warmer now so my tune could change since I am running SD without a MAF installed.

Thanks,
Bill

[SSpdDmon]

I'd say it's the throttle cracker. What RPM are you at when this happens. If you look them up in the table, what value is there? What speed does it enable/disable?

[TAQuickness]

+1 for the throttle cracker. In my case, it turned out I had way too much air for parking lot speeds. I believe my values ended up in the .5 g/s range all said and done.

[BowlingSS]

I'd say it's the throttle cracker. What RPM are you at when this happens. If you look them up in the table, what value is there? What speed does it enable/disable?

The RPM goes to about a 1000 and then when it hits 10 MPH it surges to 1200 or so. The enable speed (B4311) is 10 KMH and (B4312) 9 KMH Deactivate. I just noticed they are in KMH instead of MPH. The table (B4309)shows 0 right now at 1000RPM. It shows MPH not KWH. I need to change the values to MPH. I am going to change this to .3 to see if that is enough.

Thanks for the help.
Bill

[SSpdDmon]

The RPM goes to about a 1000 and then when it hits 10 MPH it surges to 1200 or so. The enable speed (B4311) is 10 KMH and (B4312) 9 KMH Deactivate. I just noticed they are in KMH instead of MPH. The table (B4309)shows 0 right now at 1000RPM. It shows MPH not KWH. I need to change the values to MPH. I am going to change this to .3 to see if that is enough.

Thanks for the help.
Bill

Well, once you figure out what RPM/MPH it's at, that's half the battle. The rest is just making the right changes to fix it.

IIRC, I set speeds and temps to imperial. Most everything else is metric. To change your settings, just click on this:

[BowlingSS]

It looks like .3 was not enough. I set it to .5 and will try it tomorrow.

Bill

[Rhino79]

I have found good results in my experiences with 0'ing out the TC below 15 mph or so depending on vehicle.

[BowlingSS]

I have found good results in my experiences with 0'ing out the TC below 15 mph or so depending on vehicle.

What tables did you 0 out?

Bill

[Rhino79]

I actually just changed the enable speed to 15 disable at 13. You can also 0 the TC airflow table in the corresponding rpm range and speed range.

[RevGTO]

Forgive me for suggesting the obvious, but are you sure it's not your tranny downshifting to first at that point and thus giving the rpms a bump?