1972 Elcamino 1993 Camaro Z28 LT1 T56 6 speed

[EagleMark]

Mark would injector offset voltage be the value Steveo had me calculate or is there another number I need to check as well.
Brian

It's another Parameter. You'd have to open the LT1 from 93 $DA3 and get the Offsets and place them in your $EE bin.

Well asjusting the flow rate did help I was able to get a look at my run on the dash and it is staying up around 128 more. I am going to have to do a major adjust in the idle area. open loop cold it's at 128 and the 02 sensors look like they are staying up around .9 or a little higher.
Brian

It will read 128 in OL, then when closed Loop is when you get feedback for BLM adjustments.

Everything from CAI, higher fuel pressure, cam etc... will play a role in what the numbers are. Always start your log when warmed up and driven. Gives less false data to remove when using the BLM numbers to adjust from. Also having EGR, DFCO and PE off helps get more solid BLM numbers to adjust with.

Could be why your seeing such big differences?

[beestoys]

It's another Parameter. You'd have to open the LT1 from 93 $DA3 and get the Offsets and place them in your $EE bin.

It will read 128 in OL, then when closed Loop is when you get feedback for BLM adjustments.

Everything from CAI, higher fuel pressure, cam etc... will play a role in what the numbers are. Always start your log when warmed up and driven. Gives less false data to remove when using the BLM numbers to adjust from. Also having EGR, DFCO and PE off helps get more solid BLM numbers to adjust with.

Could be why your seeing such big differences?

Thanks
I should be able to just download a 93 bin and get the numbers right? and then transpose them.

Can you just turn those parameters off with Tunerpro or do you have to set values to cause it not to activate?

EGR shouldn't be a problem as it's all disconnected anyway. I'll try and do a log run after setting it up like you mention and see what happens.

We are going to scope the injectors this weekend to see if they are leaking and the reason my rail pressure drops after the pump cycles. I'ts a new pump so I don't think the check valve has gone already but we'll see.
But if it is an injector what would be the benefit of changing all of them to a 95 version. (Besides the obvious not having to change all this in the ECM to 93 injector specs)
Thanks again.

[EagleMark]

Not sure on injector change? steveo is way better in LT1 then me so we'll see what he says. If you get or have a set of used injectors always have them serviced before the install. If there's no shop near you look up Mr Injector.

EGR needs to be turned off/disabled in bin as well as removed or it may think it's still working and change fueling and spark.

You can open two instances of TunerPRo when you need parameter values from one mask ID to another. Open TP, load XDF and bin, then Tools, Custom Tools and New Instance of TP. Then you have 2 screens to copy and paste from.

[beestoys]

Agreed on the service of them.
I'll do some digging and see what I can find on the EGR and see where it's set. I am thinking I saw it in the scalar section and it had settings in there. So I am thinking it's still active. Is there a section in Tunerpro where you can go an see if some of this stuff is on or off.
I'll try the dual look and see what I can find.
Sorry for all the questions been a gear head all my life but I have just recently got into the electronic side of it this deep anyway LOL.
And thanks again for all the help.

[EagleMark]

While data logging you can see EGR duty cycle.

[beestoys]

I'll check it tomorrow then with scan9495 and see what its doing.
Thanks

[steveo]

keep the original offsets even with your '93 injectors. they're similar injectors and they're close enough.

gm dicked with those numbers a lot (and the low pw offset adder) to play with lower rpm afr, they aren't even close to real offsets for those type of injectors.

as evidence, note injectors for a 'vette are an identical part number, running identical fuel pressure and all that, but the offsets and pw adder tables are different. the vette also has its initial BLM set to 120. you can drop all the afr variables including maf table from a 'vette tune into an f-body bin and it'll be good to go, but if you only take the injector offsets and low pw adder from the vette bin without compensating in blm and maf table it'll go haywire (i tried for fun...)

this is why sometimes plugging some 'perfect measured offsets from the injector mfr' into an lt1 ends up throwing your afr WAY off, and you end up having to tune around it, and some very similar types of injectors have published offset sheets that are very far off from what's in the stock bins.

[beestoys]

Steveo and Eagle
Redid my math and didn't realize you guys were dividing and squaring the results. SO went back and reloaded the new injector pulse rate and the idle BLM's have pulled up to 115 and 117 with the INT hovering around mid 120' to 130 idling where they would tank to 108 before. The idle counts dropped down to 13. I Seafoam fogged the snot (maybe quite literally lol) out of it Saturday then did the spirited drive as suggested. I have noticed that the hold rpm when rolling has come up about 300 rpm. It will still pull back down to 800 as requested once the car comes to a complete stop. I think I'll reset the BLM's and see where it settles. I am also researching the SD method figured out how to shut it off so once I get the flanges mounted I'll tap in the zietronix and start tuning. Again thanks for your help and if I may I would like to be able to tap on your knowledge some more.

V/R
Brian