Jpr5690

iTrader: (13)

At Wot I Can See My Commanded Afr Is Not The Same As My Actual Afr

What Tables Could Be Responceable For This Difference In Commanded To Actual Afr

Im Thinking It Is Either My Ifr Or Maf But Am Not 100% Sure Abotu Etiher

Can Anyone Verify This...

Gh0st

iTrader: (3)

MAF isn't calibrated.

Need to get your VE tables tuned, once those are tuned, turn your MAF back on, disable dynamic airflow lookup(disabling VE lookup), and then run the MAF Error % config on the Hptuners site to get your MAF in line.

Whenever I get some more free time I"m going to write a step by step process on how to get your VE and MAF calibrated.

foff667

iTrader: (2)

maf takes over fueling at 4k rpms unless the airflow table was altered through tuning meaning your maf table is probably off over 4k rpms, could be partly due to your ifr table though depending on how accurate it is.

Jpr5690

iTrader: (13)

Yep Im Using A Truck Maf And A Table Thats Suppose To Be For A Truck Maf Im Also Using 42lb Injectors And A Table Thats Supposdly For Them

My Ltrims Are Pretty Good (>5%) So Im Guessing My Ifr Is Reasonable ???

this Would Then Lead Me To Believe That I Can Just Edit My Maf Table To Correct For The % Error In My Commanded Afr To My Actual Afr??????


***knowing That This Would In Turn Conseal Any Ifr Errors I Have****

can Any One Confirm All This ...

Gh0st

iTrader: (3)

Yes, as I was saying you need to calibrate your MAF, it's obviously off if your commanded is not what you are seeing. I spent three days solely calibrating my MAF and topped it off yesterday with dyno pulls to make sure every thing was matching. Prior to me doing this, my car was commanding like 11.5 AFR and really doing 12.8.

If you have HPtuners you can find out how to do this on their site.

Jpr5690

iTrader: (13)

Yea I Think The Method Above Will Work For Calibrating My Maf, I Just Need To Upgrade To A Eio Before I Can Log My Wideband Against My Maf Freq

01'WS6

Just run a analog wire to your EGR wire coming off your computer and log EGR voltage and bingo you save $300!

Jpr5690

iTrader: (13)

Anyone Have A Link To A "how To" On This

01'WS6

Ask and you shall recieve!

http://www.hptuners.com/forum/showthread.php?t=9448

http://www.hptuners.com/forum/showthread.php?t=15538

http://www.hptuners.com/forum/showthread.php?t=15543

It seems harder than it really is. Once you read through the material then you should catch on real easy.

Gh0st

iTrader: (3)

Does a 2002 even have EGR? I thought they got rid of EGR in 1999-2000?

EDIT: I guess not?

Jpr5690

iTrader: (13)

No But The Pcm Can Still Be Wired For One.. Also Thanks To 01' Ws6 For The Links

01'WS6

You are right they did not but all you have to do is enable it through HPTuners to use the voltage output but make sure all the EGR tables are zeroed out and the codes are turned off.
No prob. It works very well as this is how all my tuning is done.

Jpr5690

iTrader: (13)

Ok Last Question.. I Know That My Maf Is Off But My Ifr Table Is Also Not So Accurate

How Could I Check The Accuracy Of My Ifr Table As I Would Like To Get This Straight Before Try And Adjust My Maf..

Jpr5690

iTrader: (13)

Also In My 2002 Ls1 Pcm Where Is The Wire I Need To Tap Into For This Egr\wideband Project

(im Guessing I Need To Pin The Harness But Still What Spot?)

01'WS6

What kind of injectors do you have?

Pin 55 in the blue connector

Jpr5690

iTrader: (13)

42lb Injectors, Racetronix Pump Kit (its Been A While)

BTW THNX AGAIN FOR THE HELP

01'WS6

What brand injectors?

Jpr5690

iTrader: (13)

Not Sure Anymore

01'WS6

Thats a problem. Are they green top injectors? U need to get a flow rate at what BAR/PSI that they were rated at is what im trying to get to. Without that you wont be able to get a accurate IFR table.

Jpr5690

iTrader: (13)

edit: I Searched Back 2 Years Ago And Found Out They Are Lucas 42lb Injectors