I need help, very new too efi live.

[goldenhp]

Any help would be greatly welcomed. Im very new to efi live ive been trolling the forum trying to get a understanding of how it works. I was originally a ford man and used sct and sniper. So now im lookin over efi and im lost really dont have a clue on where to begin. In the sct stuff i can atleast create a start up tune to get me going but this is a totally different animal, im use to injector sloes to change injector size but efi has injector flow rate which im confused on how it works. To make a long story short Im not sure where to start on this car. I tried reading the autove tutorial but i felt like my head was going explode.
The car is a 98 pontiac trans am, ls2 swap, pro 1 dart heads with p/p, lt's, exhuast and
comp cams ls1 281lr hr-113
dur @ .50 231 / 239
gross lift .617 .624
lobe seperation 113.0
1.7 roller rockers
fast 36 lbs injectors
Im not looking for someone to make me a tune for this granted that would be helpful but more or less a step by step on what to do and look for.
O yeah i got a file for ifr for the injector and i notice that my stft are runing +50% .with the stock tune they were+ 30% im not sure what to change to get them down close to o I think its in the maf table to be adjusted not sure. but also my throttle response is also poor as well. So how do you correct this. attach is a log file i got wit stock tune im not sure if it had all the pids

[Crunkmaro]

read the calc.vet tutorial found here:

http://forum.efilive.com/showthread.php?15236-A-New-Twist-on-CALC.-VE-Table..Computing-the-Entire-VE-Table.

there is a pdf version found at the end of the first post.
read the first post in all its entirety
then read it again
dl the calcvet pid file and you are going to place that file in your efilive folder (thats what i did)
it'll let you select the proper PIDS

read it and go step by step through that tutorial.

it will let you dial in your MAF as well as work on your VE tables.

[ChipsByAl]

You are going to need more than just the IFR tables for those injectors.
Al

[goldenhp]

funny thing is it runs pretty well on the stock tune and those injectors jus lean from the wb.
here is a cruising log every now and then i feel a hiccup11645

[goldenhp]

i went over the tutorial several times and follow instruction to the t but some reason it wont filter like the instructions says. so im stumped i dont wanna be changing anything not know what it does, so i came to a conclusion..... I dont know how this os work in relation to how this car runs . I thought that if i jus jump into it that it will pop out at me and i can figure it out . yea thats not happening lol. Like before ive been around mustangs for awhile an seen guys tune them myself thats how i am able to tune them im more hands on. but not ever seeing this software is takin a toll on me a lil discourage. i dont wanna play the trail and error game with cost to much to fix thats why i havent change anything at all.
So if someone can atleast point me in the direction i need so i can get a more detail descripition on how the os works that would be great.
I have a mustang dyno avail to me on it I notice car doesnt wanna go ol.

[DrkPhx]

First, verify the fuel pressure at the rail with a mechanical fuel pressure gauge to ensure you get the correct IFR. Then you need to work on the VE and MAF Tables.


Edit: I just noticed your other post with a different log.

[DrkPhx]

i went over the tutorial several times and follow instruction to the t but some reason it wont filter like the instructions says. so im stumped i dont wanna be changing anything not know what it does, so i came to a conclusion..... I dont know how this os work in relation to how this car runs . I thought that if i jus jump into it that it will pop out at me and i can figure it out . yea thats not happening lol. Like before ive been around mustangs for awhile an seen guys tune them myself thats how i am able to tune them im more hands on. but not ever seeing this software is takin a toll on me a lil discourage. i dont wanna play the trail and error game with cost to much to fix thats why i havent change anything at all.
So if someone can atleast point me in the direction i need so i can get a more detail descripition on how the os works that would be great.
I have a mustang dyno avail to me on it I notice car doesnt wanna go ol.

Don't get discouraged. It's a steep learning curved that requires a lot of time reading, datalogging and reflashing the PCM to get it right. It does become easier over time. The GM LS OS is actually a Speed Density (VE MAP based) MAF table system. Here is a good book to help you get started.

http://www.masportspeedshop.com/servlet/the-150/master-efi-tuner-tuning/Detail

[joecar]

Yes, don't be discouraged... have a read thru these: Collecting-links-to-tutorial-material-scattered-in-other-sections (http://forum.efilive.com/showthread.php?2990-Collecting-links-to-tutorial-material-scattered-in-other-sections)...

[goldenhp]

So how does the maf come into play then? whats an average fuel pressure at idle im reading 23psi

[joecar]

See second paragraph of post #4 here: Summary-Notes (http://forum.efilive.com/showthread.php?14188-Summary-Notes)

[joecar]

Fuel rail pressure should be 58 psi for non-referenced FPR (as used on 1999-2002 F-car), regardless of idle.

[joecar]

I'm still in Palm Springs, I can't view your files (I can't install the software on the hotel's business room PC).

[ScarabEpic22]

I'm still in Palm Springs, I can't view your files (I can't install the software on the hotel's business room PC).

Palm Springs huh? Im usually in the La Quinta area once a year, havent been able to go the last 2 though. Bet its hot as he|| right now!

[goldenhp]

im working on a 98 ws6 would fuel pressure be the same as the 99 to o2. is there a table to bump it up. or am i chasing a mechincal issue

[joecar]

Yes, it should be the same. Fuel pressure is mechanically controlled. On the F-car the fuel pressure regulator is in the fuel tank.

You might replace your fuel filter.

Low pressure problem can be either bad FPR, bad pump, bad pump wiring, or leaky injectors.

[joecar]

Palm Springs huh? Im usually in the La Quinta area once a year, havent been able to go the last 2 though. Bet its hot as he|| right now!Hi Erik,

Now it's only 99°F which is cold for the desert cities... last year it was 118°F :hihi:

[DrkPhx]

I'm surprised it even idles with that low of fuel pressure. Any codes? Just to make sure you should check system voltage with a digital multi meter. It's probably not the cause, but I would double check.

[DrkPhx]

As Joecar mentioned it could be several different culprits. I would start by checking the plugs to see if they're fuel fouled, then check the injectors. Replace the fuel filter as well.

[ScarabEpic22]

Hi Erik,

Now it's only 99°F which is cold for the desert cities... last year it was 118°F :hihi:

Jeez, thats spring or fall weather for down there! I was there a few years ago in July, right around 117-118F. Vowed never again.

[goldenhp]

it was the pump, now i have 58psi

[joecar]

it was the pump, now i have 58psiCool, good job :cheers: