I finished fueling for my Silverado and I am starting to tune the idle and I am having some issues. I put my idle airflow and spark to the same as the stock tune after messing around a bit and the idle is rough. Truck feels like it is misfiring, but no codes and it isn't super lean or rich. I have a cam motion "lil lope" cam in a stock 4.8. Do cams at idle just feel like they are missing or is there anything I can do to improve it?
What do you think "lil lope" means?Originally Posted by BuildDontBuy
I understand what it means, just was not sure if it makes the lope sound from the exhaust or it also feels like a misfire at idle, thanks
"Lil lope" means rough idle. You don't get the sound without the shaky shaky.
Put a cam in a customers cars 20 years ago and he calls me a few minutes down the road and says "My car is shaking at the stop light. Is it supposed to do that?" I replied "You've never ridden in a car with a cam have you?" LOL
EFI specialist
Advanced diagnostics, tuning, emissions
HPtuners dealer and tech support
email=[email protected]
Getting the fueling right will help.
It's fairly rich on the wideband. The drivers side o2 sensor is dead or unplugged.
[email protected] - [email protected]
Email tuning!!!, Mail order, Dyno tuning, Performance Parts, Electric Fan Kits, 4l80e swap harnesses, 6l80 -> 4l80e conversion harnesses, Installs
The stock mounts in gmt 800 and 900 are sloppy trash, any sort of cam exploits their softness tremendously with lots of rocking of the engine. I put atomic fab poly mounts in my 07 and it helped tremendously. Just vibration without the violent jolting.
Last edited by CptFalcon; 4 Weeks Ago at 10:16 PM.
Lope IS misfire and it is caused by EGR dilution of the intake charge at lower rpm due to increased overlap.
Reply With Quote