Cause/Fix for lean spike at VTEC Point

[North_Benn]

I have been trying to figure out why there is a lean spike at the VTEC change point. The car does not lean cut any longer but any ideas why this would be helpful. I've heard its normal (some have it and some dont).

Is it cam angle a/f?

How would I fix this.... :?

[Spunkster]

Without seeing your calibration and a datalog showing the problem it is difficult to speculate.

[North_Benn]

Here's the datalog and map that I'm working with for one of my friends. Thanks In advance if you can help...

Cam angles have not changed from the stock(base) kal

[fonz600]

You'll need to supply your map as well.

[North_Benn]

You'll need to supply your map as well.

Updated....

Another friend of mine has a totally different kal on an rsx and he too has a lean spike around 4300 but vtec is much lower for him (3000) ....(still 's doesnt lean cut...)He's not worried about it though just curious.

[fonz600]

Can you try this for me and see if it makes a difference?

Oh BTW :lol: at your notes tab. Thats a pretty accurate description for a map

[North_Benn]

I will try as soon as I have chance, Thanks in advance, I'll see what happens and let you know......

[North_Benn]

Quick question "fosz600" What kind of changes did you do.. I ran it and it worked for the first datalog but every other one it has came back. I didnt change any fuel vaules in those ranges because I'd like to get this and keep this smoothed out.

Thanks in advance!

[fonz600]

You had a dip in your low cam fuel map in column 11 I think? lifted that and I raised the high map fuel curve before the crossover to get closer to where the crossover point is.