F12 Berlinetta starting problem

Hello, my problem is completely solve with the update alternator kit.. I can drive the car like normal car as I want..
really love it..

 

That is separate part if one day u need for a replacement..
u can buy the kit part no : 330767
it will come with everything you need to fit the new alternator.

 

you can pm me for private talking we can discuss what wrong with our car..i'm using whatapps and FB also

 

Does the upgrade alternator kit remove the smart alternator function, ie. always charges, no cut off of charge to save 10 fl.Oz. of fuel….

If so then we should all upgrade, an always on alternator would solve a lot of problems, the cars are som amp hungry a short drive probably won’t recover a battery especially when it thinks the battery is 100% so uses the smart alternator to switch off charge.




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I don't know it if has smart funcion or not.. the first thing i'm notice is the Pulley for the belt it has clutch in it... the one come with the car it doesn't... and the voltage charge stabilized at 13.5 in stead of going up and down like before.

 

Sounds like it doesn’t have a switch off function, if it doesn’t then almost a need to upgrade for every V12 owner….

Anyway we can confirm ?


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So my mechanic installed an additional ground cable to the battery. It is still early for me to say if the problem is solved or not. No lazy start at the moment, but most importantly - even if I park the car with a very hot engine and start it several minutes later, I can see, that the engine cranks strongly from the very beginning. Before that it started the first 1 or 2 cranks slowly and then it got stronger and now it seems that's gone. I will drive the car for several weeks to see what will happen and I will let you guys know.

 

can you take a picture of what your mechanic did ?

 

An additional ground cable, that goes from the battery to the engine. Today was about 33 degrees Celsius here, stopped 3 times and restarted the car within 10 minutes - no issues at all. Water and oil temps were both about 100 degrees Celsius. And I definitely must say, that it cranks much stronger then before - it now cranks just the same way as when engine is cold. Next week will be even hotter - will see what will happen then. However, I think such a simple thing is a must in any case, my mechanic said he doesn't think the original ground cable is very strong at all...
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Seems like a good idea. That's a false ground terminal as the real battery connection is at the other end of the quick release mount so it should help. You have to be careful with creating ground loops though. Perhaps running the connection right up to the starter would be ideal. Not sure. Let us know how it behaves.

 

If the alt has a good ground on the engine, it should not be an issue. Doubt connecting to the engine would create a ground loop in this case.

 

would you please take a clear photo of where it attact to the engine.. maybe I will add for mine one as the backup.. thank you

 

I can't unfortunately, there is no such angle, that I can use to take a clear photo, but I'm sure there can be a place for improvisation there.

The last two days it was even hotter here and the car started perfectly every time. I still don't want to say the problem is resolved, but I can say, that there is definitely an improvement in the way the car starts when the engine bay is super hot.

 

I'm coming up on my 5 year. I've seen the following suggestions. Can anyone tell me if they have worked over time
1. 2nd ground cable
2. alternator kit
3. better wiring harness
4. lithium battery
5. battery shield
Answers will let me narrow down for the dealer

 

Ay update about the options for resolve this crank start?

 

I spoke with Ferrari Technician and told me that the kit for replace alternator and pulley its for a cut off at high speed, this its because the pulley have a clutch.
I you start in cold perfectly, drive in a highway for 45 minutes, park the car, and restart immediately again (13,5 volts) and doesn't crank properly. but keep the car sit for and hour and start perfectly, this its related to the hot environment on the engine compartment that affect the battery

 

update on this mine was solved with my local shop they just added grounds to the starter cable wires.

never had the issue since.

 

Any up

Hi, did you sort out your F12 starting problems? Mine has exactly the same problem as yours...

 

this is my opinion in regards to the slow start issue based on driving & working on my personal f12 for over a year now.

1. proceed only if you have a problem
2. get a second ground.
3. load test your battery. if failed, get a new battery.

and probably the most important: don't plug in the battery tender immediately after you shut off the engine. you'll cook the battery. do it the morning after if you must. The battery tray sits next to the header and with the engine off, all that heat just sits stationary and heats the battery. If you throw in trickle charge into that inferno, it wouldn't matter what battery you may have. It won't last a year.

as for the upgraded alternator kit, I purchased the 812 alternator kit but haven't installed it. I personally don't see a need. The only foreseeable benefit is potential prevention of the rare reporting of the belt skip. I will say 812 alternator kit looks higher quality than the stock F12 units. I think it's a fine "oem plus" upgrade for those that want the best.

 

For battery cook concerns you can add more coating to the battery thermal blanket and also lift the hood if you have a personal garage. Any battery you use is going into a surprisingly hot zone. There is also an aluminum shield that is between the header and the battery that could be improved.

 

My 2016 F12 had lazy hot starts. It would always start fine cold but after 10 min driving and shut off it would slowly crank but eventually start up. this happened almost everytime i drove it in the mornings to get gas. i tried popping the hood etc it still would lazy crank. if i waited a good 40+ minutes it would crank just fine. i never got any error codes however like some people have reported. and i also never NOT started, it just sounded like a really weak battery crank.

the battery in my F12 was the proper Interstate size battery but it was not AGM. my mechanic has speculated that non-AGM batteries are weaker and more prone to vibration and heat such as driving and that's what caused the lazy hot cranking.

i installed an Antigravity Lithium battery and for the past 3 months it has been perfect. keep in mind this is a fresh battery so i wouldn't expect problems until maybe a 1 year later however the Antigravity batteries have bluetooth module that allows you to keep track of battery usage/drain/crank test/recharge test from alternator. so far i have no issues with any of them and it has sat in my garage 2 weeks off tender and only lost 5%.

battery is expensive like 1500 delivered plus labor to install another 500. however it has solved my problems so far and probably cheaper than all the other options listed.