Car stalling after extended rest & battery swap - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

alex87f · 04-23-2020, 08:01 AM

Hello guys,

It's pretty much all in the title. My car's been stopped since the beginning of the French lockdown about 6 weeks ago, and at the same time, its battery finally died (like dead dead, it's seven years old).

It took me a while to source a new battery with the current conditions, but I finally received one (Varta D47 60Ah) today. The car was without power long enough for certain setting (AC, avg fuel economy) to reset themselves.

I started it up and drove it for about half a mile, and it stalled on me a couple of time, both times with the clutch out, as I was getting to a stop or slowing around a low-speed turn. It also takes a second to find an idle once I lift off the throttle, and the revs dip down to 350-400.

My first thought is to put that down to the ECU having to re-learn a few parameters after having finally started back up, so nothing to worry about.

What are your thoughts?

Best regards,
Alex

Gloonge · 04-23-2020, 08:03 AM

6 weeks is a long time there's likely bad fuel in it too. But it's likely a combination of both the fuel and ecu.

I would let it idle for a while (10 mins?) and then try to burn out that fuel.

Ashikabi · 04-23-2020, 08:33 AM

Yeah between the computer learning again and fuel it could cause some hiccups. Can you get a fuel treatment or stabilizer? Seafoam, heet, something along those lines would probably help

Sent from my ONEPLUS A5010 using Tapatalk

Gloonge · 04-23-2020, 08:34 AM

Quote:

Originally Posted by Ashikabi

Yeah between the computer learning again and fuel it could cause some hiccups. Can you get a fuel treatment or stabilizer? Seafoam, heet, something along those lines would probably help

Sent from my ONEPLUS A5010 using Tapatalk

That's a great idea.

Sapphireho · 04-23-2020, 09:22 AM

Sounds a lot like what my car does with the flex fuel kit when I go from e85 back to gas. Just relearning. Drive for a bit and I bet it goes away.

I doubt your gas is bad enough to do anything. If gas was bad, fuel stabilizers will not fix it. Those have to go in when the gas is good.

soundman98 · 04-23-2020, 06:40 PM

Quote:

Originally Posted by Gloonge

6 weeks is a long time there's likely bad fuel in it too. But it's likely a combination of both the fuel and ecu.

I would let it idle for a while (10 mins?) and then try to burn out that fuel.

fuel does not go bad in 6 weeks... if that was the case, the tank i had in my car since last december would have turned back into a dinosaur!

it's just the car re-learning how to take it's first steps again.

alex87f · 04-27-2020, 10:04 AM

I drove it a bit more the next day and it was already better. Still stalled once when braking to a stop (probably the brakes pulling vacuum just when the engine was at its lowest), but I think it'll be just fine.

04-23-2020, 08:01 AM	#1
alex87f Meow Join Date: Aug 2017 Drives: GT86, Volvo 996 Location: France Posts: 532 Thanks: 314 Thanked 444 Times in 236 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Car stalling after extended rest & battery swap Hello guys, It's pretty much all in the title. My car's been stopped since the beginning of the French lockdown about 6 weeks ago, and at the same time, its battery finally died (like dead dead, it's seven years old). It took me a while to source a new battery with the current conditions, but I finally received one (Varta D47 60Ah) today. The car was without power long enough for certain setting (AC, avg fuel economy) to reset themselves. I started it up and drove it for about half a mile, and it stalled on me a couple of time, both times with the clutch out, as I was getting to a stop or slowing around a low-speed turn. It also takes a second to find an idle once I lift off the throttle, and the revs dip down to 350-400. My first thought is to put that down to the ECU having to re-learn a few parameters after having finally started back up, so nothing to worry about. What are your thoughts? Best regards, Alex

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04-23-2020, 08:03 AM	#2
Gloonge Senior Member Join Date: May 2016 Drives: 2013 frs raven Location: W.P.B - Florida Posts: 224 Thanks: 5 Thanked 53 Times in 39 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	6 weeks is a long time there's likely bad fuel in it too. But it's likely a combination of both the fuel and ecu. I would let it idle for a while (10 mins?) and then try to burn out that fuel.

04-23-2020, 08:33 AM	#3
Ashikabi Senior Member Join Date: Aug 2014 Drives: 2013 FR-S Location: Northwest Iowa Posts: 7,354 Thanks: 454 Thanked 4,542 Times in 2,947 Posts Mentioned: 59 Post(s) Tagged: 5 Thread(s)	Yeah between the computer learning again and fuel it could cause some hiccups. Can you get a fuel treatment or stabilizer? Seafoam, heet, something along those lines would probably help Sent from my ONEPLUS A5010 using Tapatalk

04-23-2020, 09:22 AM	#5
Sapphireho ¯\_(ツ)_/¯ Join Date: Mar 2016 Drives: '15 ultramarine Location: Idaho Posts: 13,199 Thanks: 5,451 Thanked 18,246 Times in 8,613 Posts Mentioned: 155 Post(s) Tagged: 0 Thread(s)	Sounds a lot like what my car does with the flex fuel kit when I go from e85 back to gas. Just relearning. Drive for a bit and I bet it goes away. I doubt your gas is bad enough to do anything. If gas was bad, fuel stabilizers will not fix it. Those have to go in when the gas is good.

04-27-2020, 10:04 AM	#7
alex87f Meow Join Date: Aug 2017 Drives: GT86, Volvo 996 Location: France Posts: 532 Thanks: 314 Thanked 444 Times in 236 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I drove it a bit more the next day and it was already better. Still stalled once when braking to a stop (probably the brakes pulling vacuum just when the engine was at its lowest), but I think it'll be just fine.

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