i Just cant seem to get it tuned right . i really need some help

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03-07-2023
josepht

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i Just cant seem to get it tuned right . i really need some help

my current tune and idle scan will be attached ,
i think my spark advance might be off. its really really boggy. and i just cant get it dialed in . i would really love to hit the pedal and it to respond and just go and its not. im really frustrated. it might be running rich or lean. i dont know what to do.
another issue im having is .. when i come to a stop the idle wants to rev up and down sometimes low enough to where it dies.
lm7 5.3 engine ..specs include
New camshaft. intake dur- .050 : 228
exhaust dur- .050 : 230
intake valve lift .585
exhaust lift .585
lobe sep : 112
ingtake cent- 108
283-286
ls1 rocker arms tunnion
new ls1 oil pump
tbss air intake with fuel rail (new -stock injectors) and iridium spark plugs
fuel system is a return kind but i have a C5 VETTE fuel filter setup
throttle body adapter fopr stock throttle body 92mm
hp spark plug wires
new coil packs
upgrade Elgin hydralkic lifters and rods
1218 springs
Cold air intake original ecm
new o2 sensors
and lots of blood and tears
03-07-2023
josepht

also did egr delete
03-07-2023
2xLS1

What vehicle is this in? Swap? Weight of vehicle? Tire size? Rear gear ratio? What transmission? If auto, i see no mention of a higher stall converter. You are moving the tq and hp a lot higher in the rpm band with that cam.
03-08-2023
kevin87turbot

Quote:

Originally Posted by josepht

also did egr delete

It needs the VE table to be dialed in. Then you can adjust the Min Air table. Those two changes will help the idle issue.

You also need to change the target PE value to a more reasonable number. At this point, it's set to 3.0. It needs to be in the 1.14-1.18 range for your application.

Feel free to send a message if you want help. There are several of us that do this for a living.
03-08-2023
Alvin

Quote:

Originally Posted by josepht

my current tune and idle scan will be attached ,
i think my spark advance might be off. its really really boggy. and i just cant get it dialed in . i would really love to hit the pedal and it to respond and just go and its not. im really frustrated. it might be running rich or lean. i dont know what to do.
another issue im having is .. when i come to a stop the idle wants to rev up and down sometimes low enough to where it dies.
lm7 5.3 engine ..specs include
New camshaft. intake dur- .050 : 228
exhaust dur- .050 : 230
intake valve lift .585
exhaust lift .585
lobe sep : 112
ingtake cent- 108
283-286
ls1 rocker arms tunnion
new ls1 oil pump
tbss air intake with fuel rail (new -stock injectors) and iridium spark plugs
fuel system is a return kind but i have a C5 VETTE fuel filter setup
throttle body adapter fopr stock throttle body 92mm
hp spark plug wires
new coil packs
upgrade Elgin hydralkic lifters and rods
1218 springs
Cold air intake original ecm
new o2 sensors
and lots of blood and tears

The tune is a bit of a mess.. you have plenty of timing in it.. maybe too much at wide open. I'd say likely even.

The log didn't show much but it does look rich which will cause idle surging. The injectors aren't setup right for fix fuel pressure like you'd have with a C5 regulator/filter. You will need to eventually do SD or VE tuning with that cam to get the best driveablity.