Daily Cold start - startup hesitation

[jaifeli]

Hello, I’m having this startup issue that started about a month ago. When the car hasn’t run after half a day to a day it startups in this way were it stutters before fully starting. The car runs with no codes and just fine after that. Is this something I should be worried about and diagnose at a shop or let it be. Seen people with similar symptoms but haven’t gotten a conclusive answer yet. Thank you

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[Souprra]

Could be either the battery or the starter motor. I had a similar issue at 23k miles and the dealer was able to diagnose it as a starter issue and replaced it under warranty.

 

[jaifeli]

Could be either the battery or the starter motor. I had a similar issue at 23k miles and the dealer was able to diagnose it as a starter issue and replaced it under warranty.

I had the battery changed and it happened with the old one and still happens with the new one.

 

[Souprra]

Probably the starter motor then. My car had that hesitation starting up for a few weeks until one day I got an error code and I finally brought it in to the dealer.

 

[jaifeli]

Probably the starter motor then. My car had that hesitation starting up for a few weeks until one day I got an error code and I finally brought it in to the dealer.

Why would it only happen on cold starts tho. I thought it might be more fuel system related, like a pressure leak of some sort.

 

[lucky phil]

Might be a leaking fuel injector. Run a tank of injector cleaner through it.
Phil

 

[jaifeli]

Might be a leaking fuel injector. Run a tank of injector cleaner through it.
Phil

That’s what I thought too but how will injector cleaner help with leak tho?

 

[lucky phil]

That’s what I thought too but how will injector cleaner help with leak tho?

When the engine is shutdown it traps HP fuel between the closed injector and the pump/hp regulator. If an injector leaks then it will allow fuel into one cylinder and cause an over rich mixture in that cylinder and possible short stutter on start up. Only happens after a decently long period of shut down hence my theroy. Might be just a slight leak so normal running and fast restarts might not create the affect.
Phil

 

[jyip03]

I posted something like before, and the consensus was it sounded pretty normal. Yours sounds pretty normal to me.

 

[SJ-Ray]

My Supra sits a lot of the time for 1 to 2 weeks, since it's only my fun weekend / nice weather car, but she always starts up right away.

That first little sputter in the video is imo not normal.

 

[jaifeli]

I posted something like before, and the consensus was it sounded pretty normal. Yours sounds pretty normal to me.

It just eventually went away?

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