Hi everyone,i have problem with my CA18DET,when i turn something like tailligh,headlight,windows or something,engine rpm's going very low and it does it sometimes,sometimes it runs normaly i clean aac valve,i thought it can be bad grounding but i did very good grounding on a few places,i just dont know... need help, i have 2 videos in youtube to show u what's im talking about but i can't post url here.

I doubt it can be alternator...what you think?

OK, I removed your Newly Registered status. You can't post the video links now.

Problem solved,it was bad grounding,now i have another problem,when i start the car it seems runs on three cylinders,after driving a while (1-2 km's) it works fine,and when i stop the engine for 1-2 min's it make same thing,changing coil packs doesn't make any difference all of them works,when i unplug 2,3 or 4 cylinder has big difference,but when i unplug 1'st it has small difference in running,when it works bad have no power and sounds similar to boxer engine sound,any ideas?

Bad ignition amplifier is the most likely cause.