Cold start is a nightmare...I I'm.now with 24v dual batteries system. The ignition coil (Valeo) is new, the ignition wires to the spark plugs are new,the spark plugs are new to ( they are not iridium they are simple NGK).

My 2 batteries are charged. When I try to start , the car make some explosions and the spark plugs are very wett like if  it was too rich mixture. I remove the spark plugs and heat them. I installed them again and the engine start..it's smoking black grey for one minute and after that it's ok and the restarting is fast.

I don't understand what is wrong.

I manage to start it quickly when I put new spark plugs. But only one or 2 starts.

Too ihave a harness magnecor wires set and I feel that it is worth with it 'some mor ohme resistance on each wire)

I was thinking about changing myCR9 spark plugs with iridium ones ? can be better for cold start ?

Thanks for helping me.

Nico

It should allow you to connect and download the chipfile, once downloaded you should be able to email it like any other file.

Yes i have. I just installed OBD and tested connection couple weeks ago. How do i download and send you the file? Via email or what?

Do you have the leads to connect to the ECU?

Do you want to send me your chip file to take a look at?

Sounds like either a problem with your start map or that a sensor is not reading correctly so causing map changes to start.

Its the only thing i do. I allways turn off masterswitch, not to pull any power from my aux connections.

 I have upgraded single coils, and looks to me like low spark, OR the spark doesnt come all the time.

but no back/missfire or anything

when it starts it starts like there is no problem at all.. but i could crank the fuck out of it for a longer period of time without anything happening. Its not voltage related in any case. I have tested out everything

plugs are also dry after cranking and resetting ignition

No strange noise, no struggle no nothing.. i can crank it for 2-3minutes .. nothing.. then push button again and it starts at 1st turn.

Feels really like fuel isnt comming, but i do have 2.7bar at the rail when priming;k)

9a4 ecu, with map from mbe motorsports.

i wonder if the map is bad for hotstart sequence?

Hmm ok, have you tried swapping batteries? If the main battery is struggling it may sounds ok due to 24v but not providing enough power for the ECU etc.

Also any strange noises and does the engine spin over at the same speed when hot?

Hi, nope, its a 1300, and i have the 24v setup with a new starter. 

feels more like fuel is not comming or bad spark.. but starts easy when its cold