VE tuning questions/problems

[LETZRIDE]

If I leave the MAF unplugged, can I turn off the DTC, and the light and not have the pcm try to read from the MAF table? or am I only able to turn off the light?

I know if you have the MAF plugged in you can only switch off the light, but my maf is unplugged...not sure if this makes a difference?

[mvenom408]

Now im just throwing this out there.......is it possible to run an LS1 PCM with a V6? The Ls1 PCM has cyl. volume tables.....on second thought nevermind lol........what about ignition firing order and injector firing order( if its even called that)

[murphinator]

Now im just throwing this out there.......is it possible to run an LS1 PCM with a V6? The Ls1 PCM has cyl. volume tables.....on second thought nevermind lol........what about ignition firing order and injector firing order( if its even called that)

I like the outside the box thinking there

I wonder if there is a tuning guru out there that could make the necessary changes to do something like you are suggesting by using ANY other pcm that has more capability than the stock ones - not necssarily an ls1 but ANY that could be adapted

[LETZRIDE]

Id like to know more on this as well...if it is possible to run a different PCM I would DEFINATLY give it a shot...

another thing I would like to know, is remember when I said that in the VE table the numbers represent % of cylinder fill? and that 200% is the max we can input...well, I want to know what determines the cylinder fill? like there has to be a base number right? like say the base number was 100 cfm, then 200% of that would be 200cfm...I know I can't input more then 200% on the ve table, but if I can find out what that 200% is based off of, then maybe I can change that number?

Not sure if that made any sense, but its kinda hard for me to explain.

[Perforator]

It's not a % of cylinder fill. It's a multiplier that they limit to 2 as in 200% is the highest you can go.

[LETZRIDE]

It's not a % of cylinder fill. It's a multiplier that they limit to 2 as in 200% is the highest you can go.

Ok, what is it multiplying? is it something in the Acceleration enrichment table maybe?

[darkhorizon]

So, you have been doing all of this tuning with a unplugged maf sensor, and a working IAT sensor?

Can you post some logs?

[Perforator]

Ok, what is it multiplying? is it something in the Acceleration enrichment table maybe?

There's a base airflow value for your engine. Then they get all these modifiers like coolant, air temp, egr, etc. and multiply it against the base airflow value in order to calculate what the current airflow actually is. VE is just one of the modifiers. Acceleration enrichment is multiplied against the injector flow rate along with decel enleanmeant, short and long term fuel trims, etc.

[LETZRIDE]

So, you have been doing all of this tuning with a unplugged maf sensor, and a working IAT sensor?

Can you post some logs?

Yes, Ive been driving for 2 weeks without a MAF now...

here is one from yesterday

Attachment 22435

and one from on my way home from work today

Attachment 22436

There's a base airflow value for your engine. Then they get all these modifiers like coolant, air temp, egr, etc. and multiply it against the base airflow value in order to calculate what the current airflow actually is. VE is just one of the modifiers. Acceleration enrichment is multiplied against the injector flow rate along with decel enleanmeant, short and long term fuel trims, etc.

So are you saying that if I use the AE enrichment modifier vs Baro, and increase the number from 1.00 to something like 2.00...it will richen my car up as all the numbers in my VE table will not multiply by 2 rather then 1 which that table is set at right now??? If this is the case, then I don't care if the VE table is limited at 200%, as I can adjust everything by changing that AE number??

[Perforator]

AE only gets triggered under certain circumstances.

[LETZRIDE]

well there are several AE tables. When does the Baro one get triggered? I was looking at it, and it looks like it may get triggered as the VE goes through the different KPA cells on the ve table. Cause it was just a sequential number of KPA cells, with the number 1.00 inputted into each.

or do you know which of the AE tables would be triggered under WOT?

[Perforator]

AE gets triggered by throttle position. The other AE tables modify the final AE value.

[LETZRIDE]

can you explain the ref count to me? I have changed the TPS delta and it looks like I am making progress....although it is scary to think that the max I can input is 4, and I am around 2 now and still needing to add fuel!...

[Perforator]

The reference count table is a modifier like the others. It's referenced from the start of AE by what I believe the consensus is the 3X crank sensor but I'm not sure. When you reach the end of the table you use the last value.

[LETZRIDE]

No, I meant the actual disable reference count...its a single box...it says something about once a cell counts X amount of counts then AE will be disabled... I kinda don't understand it...

Plus, wouldn't I not want AE to be disabled?

[Perforator]

AE is temporary, it's for acceleration only. Once you reach the count it's stopped.

[LETZRIDE]

So Ive been upping all my AE tables...I have the TPS delta maxed at 4, I have the ECT vs run AE table maxed at 4...I'm at 10.5 out of 16 in my baro table...I seem to be seeing progress in my 100kpa WOT table, but only up to about 4200 or 4800 rpm...after that its like I am always 8% shy of fuel, and I am at 200% VE in those cells...why is it that my lower rpms are seeing changes from increased AE numbers, but the higher rpms are not being effected really?

should I be disabling that filter thing?

[Perforator]

Maybe you're hitting the disable reference count.

[LETZRIDE]

Maybe you're hitting the disable reference count.

should I set the disable reference count to an unattainable number?

I know on the shift, the next gear seems to be getting the AE for the most part downlow, then begins to slowly loose it up high again, but not as bad....it'll read like 12.7-12.9 rather then 13.1 ish when it is trying to command 12.00

[LETZRIDE]

can someone help me out a little with the Acceleration enrichment

Filter TPS? What does that mean when it is enabled/disabled?

and WOT disable? I've read the tiny description like 500 times but I find it confusing as hell...