COS 5 Help Needed Here...Please

[tatasta]

Ok. I got the cax file in the right place, finally. The one I loaded has B9012 and B9014 but not B9021 so I will search around.
The last drive, when the car idles in gear, not moving at 0% TPS it idles around 880rpm. I can let off the brake and still at 0% TPS the idle will not go up even at 7-9 mph. But, as soon as I touch the throttle, the idle jumps to 1250rpm and will stay there until I stop the car. I guess the question is whether it this is a pulse width problem, airflow problem or a problem related to what the VSS is reporting.
If I could get the idle, I would be pretty close.

[tatasta]

Got B9021 I think.

[johnv]

Ok we can't see B9021 in your tune file without loading the CAX file for your operating system.

If you can now see that table , set it to the same as minimum pulse width (0.592722)

I think your idle problem is more airflow related, the transient minimum pulse width will help with the rich decel.

I will PM you a guide i put together for basic idle setup.

[joecar]

Robert, please post the .cax file you have (I want to sanity check it).

[tatasta]

joecar,

Here is the cax I used.

[tatasta]

johnv,

I got the idle alot better. I logged RAFIG & RAPN. Just not real sure what to do with the data. How should I apply the results to the airflow table? Also, I adjusted the IAC steps by unplugging TPS and turning set screw clockwise just under one full revolution.

Anyway, thanks for the help. Cruise control effect is basically gone. Idle is still a bit surgy.

-Bob

[joecar]

Robert,

I'm sorry I couldn't get back to you sooner...

You can delete your existing cax file, some of those parameters have been included in the 12212156/02020005 calibration definition...

You want B9021, see attached cax file...

Or, if you really want all those definitions (they will be duplicates, that's ok, they won't hurt anything), you can copy/paste the [B9021] block from the attached cax file into your existing cax file (copy every line between the rows of equal signs, and then paste that block at the end of your file)... if you look closely at your cax file you will see the structure of it, each block has an id enclosed in square brackets followed by a dozen or so lines defining what/where the parameter is.

[johnv]

Ok have applied it for you, but for future ref you copy results with lables from RAFIG and RAFIPN maps and paste with lables and "add" to the tables in your tune.

the surging is probably timing related , log where its surging and try adding a bit of timing in the main timing tables in that area.

[tatasta]

johnv and joecar,

Thank you guys for all of the help. The car is really coming together. I think once the idle is dialed in, I will transition boost timing to the A0010 table. I plan to go out and log some data today. The sun is actually shining here today.
The trans still is having trouble shifting 1-2. It seems like it blows right past its shift points. Probably slipping, I guess. My wife is just getting over supercharger sticker shock. So, new trans shock is gonna be trouble.
Also, is the plan to re-enable LTFTs once the VE is dialed in?

Thanks again
- Bob

[johnv]

Good to here its all coming together,
yes once your happy with your main VE table you can re enable LTFTs, you are aiming to see fueltrims in the 1-2 % range and preferably -ve as +ve fuel trims are added to total fueling in PE mode and can cause inconsistant fueling when in PE, (-ve trims are not added).

RE the trans , all you can do is add more torque reduction and lower the WOT shift RPM and MPH in an attempt to get it to complete the shift
in time (just a band aid tho) Start saving for a beefed up trans.