Can't change timing in Octane tables...

[e85grandprix]

I have an 04 impala that i started tuning for a local and no matter what i command in the high octane tables i doesn't change anything. My 2002 and 2000 gtp both get what i command but for some reason it's not working on this impala. Did i do something wrong? So far we've been changing his timing through the AFRVSspark tables. I tried a "write entire" hoping that would solve the issue and got nothing Thanks in advance to anyone that can help!

[Perforator]

What kind of motor does the 2004 Impala have?

[mecanicman]

Did you try modifying the low octance table and see if it had any result? Maybe the fuel in the car is low quality and running off low octance?

[e85grandprix]

The impala has the l67 series II nothing cool unfortunately. I haven't tried messing with the low octane tables however i know for a fact it's not referencing them. I also was helping someone out at the Dragstrip with his tuning and he has the same problem it won't run commanded timing. Whatever the tables say before any changes are made is what we get, period. Kinda frustrating to be honest... I would really like to figure this out.

[driftnpow]

Correct me if im wrong as im going by memory atm, prob find ign timing will reference from the high octane table first - when significant KR is noticed it will then refer to the low octane table.

[IndeedSS]

Mine reflects the changes made. Is it not changing anywhere (idle, cruise, WOT,etc)?

[Perforator]

I don't know what the AFRVSspark table is. If you want to change the timing you should be changing it in the High Octane Spark table.

[e85grandprix]

Mine reflects the changes made. Is it not changing anywhere (idle, cruise, WOT,etc)?

It won't change in any of the cells, i get nothing. Doesn't matter what i command in low/high octane for some reason it's just not working... I should clarify though, if i change say all the cruising cells and add 8* of timing it will show the added timing in the chart but when i scan there's no change what so ever.

I don't know what the AFRVSspark table is. If you want to change the timing you should be changing it in the High Octane Spark table.

lol hence the reason i started this thread...

[Perforator]

What table are you changing? Maybe you should post your bin and a scan. That would probably help.

[e85grandprix]

What table are you changing? Maybe you should post your bin and a scan. That would probably help.

I'm I figured it out... I'm an idiot, and usually the first to admit it. Lucky for me, nobody knows what i look like...

[IndeedSS]

Glad you figured it out, but now you have to anonymously tell us what you were doing wrong. We won't tell it was you.

[e85grandprix]

I was changing the timing in the .92 (g/cyl) cells but the car is stock so it never gets high enough for those cells, i made adjustments to the .80 cells and it worked.

Which brings me to another question... Why isn't it getting up in those cells? This problem is also on my stock GTP which is the car in question now. The scans show (attatched) the car is getting plenty of air (10,000hz on the maf, high 150 kpa) but the stock boost gauge doesn't max out until the wayyyy upper rpm's. Maybe after 5500 it'll finally fill in the last cell. It starts with just 3/4 of them and slowly raises with rpm's. I thought maybe belt slip so i got a new belt, didn't help, found a vac leak, nothing... what the heck?! I compared this to my other car which was on a 3.0 pulley (supporting mods) and that car only got 172kpa which doesn't seem like a huge difference to me but easily fills in the .92 (g/cyl) in the histograms.

[Perforator]

I just checked one of my old scans and I don't hit .92 until around 160kpa so that sounds about right.

[e85grandprix]

Thanks for clearing that up, idk what's going on with the stock boost gauge but everything seems to be in order according to the scans. I get about 7.5 or so psi on a stock pulley which as far as i've picked up is pretty much the norm.

Owell, going for high 13's tomorrow hopefully i get it.