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

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.

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

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That's a great idea.

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.

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.

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.