Warm engine start problem

[m.hlavik@gmail.com]

Hi guys. Any recommend strongly apreciated. When i start my car cold, no problem at all. Start fast, all 8 cylinders. But when the engine is hot, car wouldnt run on all 8 cylinders, sometimes even dont keep idle and shut off. I need to start the car play with throttle pedal, let it run higher over 2.000 rpm, than sometimes come easy to all 8 cyl.., sometimes not. Need to restart again. I was try in my opininon all possible. Main ground on the bottom, valve cover grounds, injectors new, spark plugs new, coils new, throttle actuators new, O2 sensors new. Checked pipes for air leak, couldnt see by my eyes any problem. If i let it work longer, around 20 sec, than show misfire codes to my diag. Randoomly, its still diferrent cylinder positions, but usually dont show any code, as when i feel, its not on all cylinders, i turn off and restart the car again. Once running all 8, its working perfect with no issues, no problems.....Im really frustrated. My engine is newbuild and all those starts make me crazy.

[padde2]

Fuel Breather or Idle Control Valve i would say

[BPMSport]

Post a picture of the positive jump terminal with the cover removed beneath it.

I'm pointing at the cover to remove in the pic.

Do you have vanos faults?

Was the engine fully removed from the car and reinstalled?

Have seen reinstallation of cables to the wrong positions under that cover cause issues as you are describing.

[m.hlavik@gmail.com]

Hi. Thank you so much for your answer. I dont know, how come, that i didnt see your answer. Anyway car is still not working properly. I would say even worse. sometimes even with cold engine, have a problem and come to limp mode with missfires. Now my car is 800 km from me in my friend shop. I will ask him to check it on monday. So if im understand well, we have to deinstall some plastic cover, that is under the plus terminal and check the connections of those cables and their position, if they are correct positions right? I cannot imagine 100% now, how it looks there, as im not with my car. Thanks again, looking forward your answer, as its so long, that my car doesnt work. Im waiting the timing tool to recheck my timing. No vanos faults, yes, engine was fully removed because injector failure. Engine was sleeved on cylinder 6 and collected back. Thank you.

[m.hlavik@gmail.com]

do you mean this cable?

[BPMSport]

Originally Posted by m.hlavik@gmail.com

do you mean this cable?

That looks correct. Check the ground connection to the chassis coming off of the harness as well

[m.hlavik@gmail.com]

ground connection is 100% ok. was checked out already.

[woody888]

I got the similar problem as well. Have U solved the issue yet?