One question: Are you still using the crappy azzed OEM Battery Terminal Connectors?

If so, do yourself a favor and hack them off and replace with a quality aftermarket set like Stingers or your favorite brand. THE #1 mod to be done to every H3.

 

thanks will do

 

Update:
Changed the dex 6 to Castrol dex3-H as per TC Borg specification.


In fact called a mechanic, we spotted a misfire in 2 cylinders, we changed all the spark plug.
Shudder went away but the car feels like its super heavy (like in high ).
Switched to high and low and back to normal with no issue so far.
But while it was hesitating, it trowed a Transmission failure: mechanic told me its normal since no power since 2 cylinder were failing to deliver proper torque.
But After reset all dtc went away.
But I felt the inside car a little hotter then usual...
Ps: I feel really unlucky to have failed spark plugs (65000miles) the very same day that I did the TC drain. Or is the TC ......will see

 

That's a lot to take in... I need another beer.

Btw, your mechanic needs more education.
Random misfires can happen and most likely it's not the spark plugs!
Shudder is most likely derived from the transmission.
Check condition/level of the transmission fluid, and I recommend to add a can of seafoam.

 

In third world countries unfortunately mechanic dont have the chance of having an education, it is an empirical knowledge.
Yes he is not educated 😔...
It started today again misfiring or shuddering...
Went away after 10min or 2 miles driving at 10mph

 

, you can either educate your mechanic or diy.
Start by posting the codes.
Then check the transmission fluid level & color.

 

😂😂
I am not that good...
I could read after 15 attempts:
P0352 and p0354
Does it correspond to ignition coil failure of cylinders 2 and 4 or their harnesses?
I will try to order pack of 5 Ignition coils.
New spark didnt solve it.
Btw: drained 2 times TC, 1st and 2nd oil super clean.
Transmission level is correct, color is red no burn smell. It shifts normally.
Now I wouldn't say shuddering, I would say very rough idle after 15min drive and goes away after 5 min....could it be bad gasoline?did a fill up before this problem.
Thanks for your help

 

Do the Battery Terminal replacement like I said, first. Cheap and easy. You would be surprised (I wouldn't) what symptoms failure to maintain consistent voltage can cause, including yours. H3s are known to be very sensitive to even minute tiny (millivolt) changes.

For a rough idle take a look at the FAQ section thread about that and avoid posting there.

 

Are those ok?

Check this out: Stinger SPT53501 Positive/Negative Battery Terminal (2) 4 Gauge ...

 

Should be, but read the comments. It seams the price is for ONE terminal, not both????? I believe it, Stingers are not that cheap.

I used SPT53302 & SPT53102.... different part #s +/-. Ebay Stingers