So Ive managed to develop a throttle hang on decel off the gas and only at around 1000rpm. I can rewrite the same tune into the Jeep and it wont hang but after a couple days it will come back. Doesn't matter whether I reset adaptives or not.
Looked at the usual suspects but but no luck figuring it out with the limited tuning knowledge I have.
Attached current tune and a short log. The last 30 seconds of the log really shows the hang. Yes the VE looks like garbage at the moment. I have had it lean, rich and cleaned up and it will still hang.
I also have a NGC4 jeep commander running a healthy 224/234 camshaft. Right around 1k-1500 i would get an annoying rev hang, especially between gears.
My solution although not elegant, was to reduce part throttle timing in those areas. I tried every trick i could with throttle control. Pedal follower, friction torque, small/large/model airflow.
I reduced my timing to 6-8 degrees at 0.20 aircharge between 1200-4000 rpm. and i would ramp it up 3-4 degrees per row until back into "normal" part throttle ranges. so at 0.30 im at about 12 degrees. I applied this to all VVT part throttle tables as well.
After making the changes that were suggested it still did a hang and a bit of surge at the same point a couple times. I wrote to the ECU again with a minor change to the trans for when 4-5 up shifts, so unrelated I would think to my original issue but it hasn't really hung for the last few days...
To what LaBrat is saying I didn't think there was air charge or vvt on the NGC4 os?
Hello to all of you. I have the same Issue. My car is a 2005 300C 5.7 with a swapped engine to 6.1 and a CompCam 278. I tried so many things, changed the tuner, tried another Tuningsystem, but nothing works. At the beginning I had a NGC3 ECU, but this won't work at all. Now I have a NGC4 and everything is fine. But, if I drive the Car in the City, the last tuning file was flashed and some warm up cycles are done, the car hold the gas between 900 and 1200rpm. I need to brake the engine down to 900rpm to stop. Thats so ugly. Only if I lower the friction loos table, it works but the engine shakes badly at idle without driving. Can someone help me out? I do not want to reinstall the original cam.
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