bandit383

iTrader: (8)

Got a 01 Trans am with a NEW stock displacement LS1 with following boltons

Patriot STG 3 heads
slp LT header
MS4 cam
44 LB racetronix Injectors ( maybe a bit big but needed new ones)

the started after install and did the cam break in just fine.

but when I drove the car it was cutting out bad. after a ten min. drive car smoothed its self out. did a few launches and it did fine in 1st and 2nd but in third stumbled bad at about 60 mph. got home and ck the plugs they were black. this morning tried to update the injectors and the plugs were drenched with gas and I changed them. So I uploaded the last tune and the car did the same a 1st start on motor. it seams like the car is way rich and cuts out bad when driving.

I think the bigger injectors with stock injectors settings are the big problem. So how do I tell the pcm the correct settings? cant attch (i can e-mail it to ya) my current tune so any help on this is needed and maybe some education on the process.

bandit383

iTrader: (8)

here is my file

Chris05ssTruck

iTrader: (9)

U need a retune, whole new set up.

bandit383

iTrader: (8)

it has allready been tuned for the heads and a 231/237 cam..

Chris05ssTruck

iTrader: (9)

Well the injectors changed, have to retune.

chevysten

iTrader: (5)

You need to change the injector constant.I had to do the same thing when I upgraded the injectors.That was with hp tuners.

bandit383

iTrader: (8)

how did you change yours. i have the 42LB racetronix

98Camarod

iTrader: (43)

You have to change it with hp tuners or efi live.

SSAUTOCHROME

iTrader: (2)

I had the same question. Easy fix. Go to HPTuners.com. Log in. Go to the tune library. Download a similar tune by searching for the size injector your have. Bring up your current tune in the editor, then using the compare feature bring up the tune with the injectors size you need. Simply copy over the following values using the compare feature. ONLY copy over the tables I have listed below.

Answer given to me in PM by WS6FirebirdTA00 (Moderator) on HPTuners.com/Forum. Thank again man!

"If they are known good tables, copy over the offset, short pulse adder, default pulse, and min pulse."

DONE SON!

SSAUTOCHROME

iTrader: (2)

Update!

We did just the above yesterday for our FAST 36lb. injectors and it looks like the guy who uploaded/noted his tune with FAST 36lb. injectors NEVER updated the tables. He basically said "I have these hard parts installed..." but never tuned the tables from stock for them. SO what I am saying is be careful when assuming that the tune in the repository is ready to rock! It hasn't hurt anything yet but our ego.

edcmat-l1

iTrader: (10)

Saw your post on HPT forums too. You may want to download the injector spread sheet.
Just a FYI, it's never a good idea to copy and paste from another tune, unless it's one of your own ,and you know the accuracy of it.

SSAUTOCHROME

iTrader: (2)

F*in' A right! I finally figure it all out thanks to Bill@HPTuners.com. This was a classic case of self .

Anyhow to answer this threads question regarding the new injectors. I copied my (Cantalope Kid) answer from HPTuners.com in case you missed it. Hope this helps yah out man.

http://www.hptuners.com/forum/showthread.php?t=21436

bandit383

iTrader: (8)

UPDATE got he car to TSP and jason tunned the car on the dyno all is good... just need to get it inspected....