Is there a parameter for A/F ratio when the throttle is cracked from a dead stop?

[Mike04]

Is there a parameter that controls the addition of fuel when the throttle is cracked from a dead stop?

When I give my car a normal acceleration after setting at a dead stop for 30 seconds or so, my A/f dips very rich and I can feel the car hesitate for 1/2 a second. It doesn't do this every time. I can't see where IAT has an affect. Could this be a heat soak issue?

[vette_doc]

post your scan and tune file

[EC_Tune]

VE table too rich? MAF table too rich?
Are you running 2 bar yet? You should be with your boost level.

[WS6FirebirdTA00]

VE table too rich? MAF table too rich?
Are you running 2 bar yet? You should be with your boost level.

Exactly, if your car is doing that, it sounds like you need to revisit VE/MAF (if you have it) tuning.

[Mike04]

I'm hesitant to go with the 2 Bar. I'm not confident enough in my abilities to do it right yet. I am getting really getting tired of chasing my start up issues (car tends to hange at about 400 rpm ever now and then for a second or two) and the above posted issue.

I'm just about to the point of giving up and trying the 2 Bar, what do I have to loose....

I wonder how many hour I have into this tune

[EC_Tune]

You may find that tuning *just* the VE table will be easier than you think.

Here's how I set up 2 bar VE tables.

Copy your old VE table up to 105 Kpa to the new VE table (2 instances of the editor are required, old tune & new 2 bar tune).

Then go to the 210 Kpa line and from 0 to 1600 RPM put 120 in the table, from 2000-3200 put 130, 3600 to 5200 put in 160 and 5600 up put 130 in the table. These values will probably be high but it's a good start.

Now use the Interpolate between Vertical Bounds Attachment 6717from 210 Kpa to 105 Kpa and you have a startup VE table.

Use your AFR error % to adjust it. Once you have it ~-1% you're good to go.