Rough start/running/stalling issue. Tests to run to diagnose it?

Fuel pressure gauge on the fuel rail see what pressure each side is running at.
I allways start with the basics. Air ,fuel ,spark.
What tools do you have.

 

Any of those phantom codes relating to throttle control/position or (accelerator) pedal position?

 

What are the new error codes

Sent from my moto g power using Tapatalk

 

Check codes.
Check fuel pressure each side.
Check ltft’s. Long term fuel trims.
Check voltage from battery.
Are battery terminals clean and tight?
Hopefully no one jump started this car.


I’ve cleaned mass air sensors and then had them completely fail afterwards. I’ve found cleaning buys you time before you need new ones sometimes. Try another set of mass air meters if you have some handy or have a friend w them.

 

Try disconnecting one of the MAF sensors. If the car runs better, then that's a clue.

 

You've had the car a month? Where was it prior to your ownership? How long was it sitting? How old is the gas?

/

 

You are just paying the used Ferrari sweat equity tax…. I promise this will get better once sorted… then drive enjoy.

 

From what I've been told, a rough running engine can cause the cats in the headers to break up with little parts of the ceramic matrix being sucked into the engine, potentially causing catastrophic damage.

It's suggested to not drive a 360 when it's misfiring.

If the car won't start after the second try, you should consider your drive over.

 

Two silly questions

Did you do a relearn after battery install and additionally do you wait for the "ok" before starting

Also check for ground cables ..make sure clean and tight in frame etc

Also could be dirt/gum get stuck on screens on fuel pumps

Try mixing BG44 in fresh fuel and let sit overnight and see if that changes anything

Sent from my moto g power using Tapatalk

 

Dirty/clogged fuel injectors or injector seals eaten by alcohol can also give those symptoms.

 

I wasn't able to find all of your codes, but.....

P1269 Safety fuel cutoff (bank 2)

P1199 Ambient pressure Adaptation (Bank 2)

P0141 ? Not listed

P0031 ? Not listed

P0102 MAF

P0448 Evap system vent valve shorted

P0414 ? Not listed

P1594 Intake Manifold Switching Valve #2 shorting to ground

P0661 ? Not listed

P0037 ? Not listed

P0445 ? Not listed, but amongst the evap system codes

**************************

P1269 Safety fuel cutoff (bank 2) sounds interesting. Did you see this symbol on your digital fault display?

Image Unavailable, Please Login

The inertia switch is in the driver's footwell (outboard)

Image Unavailable, Please Login

There are no relays directly wired to this, unlike some Ferraris. The switch sends a signal to both engine ECUs which shut down the fuel pumps after an accident. I guess you could try jiggling the reset button to see if anything happens. However, as far as I know, there is only one output wire on this switch (which goes to a splice and then to both ECUs), so you would expect both banks to shut down if the inertia switch had developed a problem. I know these switches cause problems on the 550 Maranello.

The shorted wiring codes also sound interesting, but finding them could take a bit of effort. Anyway, I have wiring diagrams if you need them.

 

I did read someone had same issue and ended up being the inertia sensor

Sent from my moto g power using Tapatalk

 

Interesting. I know on the 550 you can short out the switch as a temporary fix, but I don't know if the 360 is wired up the same. Also, access to the 550 switch is a lot easier.

 

Like the previous poster said. Air, fuel and spark. Go through your checklists one at a time and the answer will come and it will be incredibly satisfying and you will know your car just a little more.

 

Did a mouse chew some wiring? If it sat a lot it's very possible.

 

I did find one fault thread that turned out to be the wiring for the inertia switch going to one ECU. How badly does a 360 engine run with one bank shut down?

 

I'd replace the MAF's. Get the bosch ones with the same part#. approx $100 each I think. I don't have a lot of confidence in cleaning the MAF's. How many miles does the car have?