Hello guys, nice to meet you...
This is my last chance, to solve my biggest problem in my live, at the moment.
Two years ago, I had the dump idea, to swap a 6.1 Hemi into my Chrysler 300C LX with 5.7 Hemi.
So I bought a car with a body damage, take out the Engine, transmission and all the other stuff like PCM, TCM...
I teared down the Engine, build it up with ne parts from Melling and Mopar and put in a Comp Cam 268, with better valve springs.
After I put everything together, I had installed a custom tune from my tuning dealer and start driving.
The PCM was taken from the 6.1 vehicle from 2006. The tuning software was from diablo with intune.
After 1 year driving an testing an 25 tunes later, my tuner said, there must be an issue with the engine like vacuum leak etc.,
because the engine drive without foot on the gas, with 1200 rpm in each gear, until I slow down to maybe 25 KPH.
I had tear down the intake several times, with new gaskets, but it won't get better.
Now, after I had heard from HPTuners and the throttle crackers, with many videos on Youtube, I bought the interface and credits, read out the tune
and try my best, to delete the Idle. First I take down every idle adders, after that, I modified the throttle voltages and airflow. (Throttle Body Airflow and feedforward control small and large range). This helps a lot and the high idle was gone, until I started to take the fuel trims to zero. My fuel trims at idle were at +8% in the log file.
If I add these 8% in the editor, clear all adaptives and drive, the first 50km are good, but after these, the idle starts to go up.
I'm at the bottom of hope, please can someone help me with this issue?6.1hemicompcam.hpt