misfire after battery disconnect

[kenpile]

As I don't drive too often lately and my 2013 Genni 5.0 R-Spec has a parasitic drain, I disconnect the battery when I know I won't be driving it the next day. When I reconnect to use the car, I have to let the car warm up for 5 minutes before I touch the throttle. If I don't, after driving for a few miles the car will develop a terrible misfire, especially adfter giving it some gas, and become undrivable.

This never used to happen so I guess something is malfunctioning. I didn't used to warm up the car before I drive it after a battery disconnect and I suspect either a sensor or the ECU is malfunctioning. Can anyone tell me what is the likely cause or if they have suffered a similar problem?

Thanks in advance

 

[enrique_7812x]

By disconnecting/reconnecting the battery, are you forcing the car to relearn any vital systems and computer settings it needs to run properly? Have you considered using a smart charger/maintainer like a NOCO GENIUS 5 when you’re not using the car for a few days instead? It won’t pinpoint the parasitic drain issue, but you won’t lose any vital settings either, and it’ll keep your battery healthier.

 

[kenpile]

By disconnecting/reconnecting the battery, are you forcing the car to relearn any vital systems and computer settings it needs to run properly? Have you considered using a smart charger/maintainer like a NOCO GENIUS 5 when you’re not using the car for a few days instead? It won’t pinpoint the parasitic drain issue, but you won’t lose any vital settings either, and it’ll keep your battery healthier.

Yes, I beleive the car relearns many systems. Usually this was unproblematic but now it seems that if I touch the throttle, even before I start the engine, the learn process seems to go wrong.
I have considered using a smart charger but because it can be weeks between uses I prefer not to have anything connected for that long but thanks for the tip