Technical fiat 500 not starting

[RJE6]

i have a fiat 500 2010 1.2L petrol the car has had a new battery fitted and it ran fine then went on holiday for 2 weeks come back and the car won’t start but i can bump it and runs fine until i stop at say a junction it cuts out i’m thinking either battery not working properly, alternator not charging or some type of fuel issue if anyone knows or can think of anything else let me know

also if i can post a video i will its of the car when trying to start up o

 

[John202020]

Two things
Car have Bluetooth?
Will need a new engine earth strap if not replaced

 

[RJE6]

Two things
Car have Bluetooth?
Will need a new engine earth strap if not replaced

how would that affect the car not starting?

 

[jrkitching]

how would that affect the car not starting?

If the bluetooth module fails (which happens a lot), it usually continues to draw current even when the car is switched off, and this is sufficient to flatten even a brand new battery within a day or two.

The giveaway telltale if this happens is that the mileage reading will usually start flashing.

If this has happened, you'll need to physically pull the power connector off the bluetooth module.

It's also possible that the alternator isn't charging properly.

Be aware also that even a new battery left fully discharged for a couple of weeks may be permanently ruined.

At this point, I'd remove the battery, fully charge it on the bench, and then check the voltage again after it's been standing at least overnight.

If it then loses charge in a few days when connected to the car, even if you're not driving it, you'll have a better idea of what's going on.

There is a small residual current drain when powered off, but it's very small - a 500 with a new battery should be able to start after standing for a month at least.

If it's not starting and you have good battery voltage, that's the time to look carefully at the earths and high current cabling.

 

[AnthonyH]

Charge the battery fully.

If still problems then check the earth strap and spark plugs.