[TampaSRT]

I found a few threads on this subject, but figured I would ask again. After the car sits for 2-3 hours, when I start it, it takes a second or two longer to fire up. The ignition cycles for a couple seconds before it fires up. Cold starts seem to be fine, it's just warm starts after it has sat for 2-3 hours. It has done this several times now. A few people have commented that it could be a fuel pressure issue. The car runs like a champ just the occasional longer than usual start up. My 2019 Hellcat did this once, but I don't recall it doing again.

 

[Rockster]

My 2018 Hellcat would require a slightly longer crank before starting. And it seemed to me the cranking speed was slower. Not lots but admittedly borderline between reality and imagination.

Whatever I found more frequent use was the solution. These cars based on my experience do not like to sit unused for any length of time. BTW more frequent use but also when started the car must be driven enough to give the alternator time to replenish the battery for what it lost from sitting and from starting the engine. A cold start followed by just a few miles of driving is not sufficient. I used the car for my 30 mile work commute which was plenty of time to replenish the battery during the drive to work in the morning and then replenish the battery during the drive home in the evening.

I do not recall this longer crank before starting happening when the engine was up to temperature. But my usage seldom found me parking the car hot then leaving it sit for a couple of hours before driving it again. Most of the time I'd shut off the engine for a gasoline stop (~5 minutes) or to make a run into a store (<15 minutes) or at a restaurant (~1 hour) or most often I'd shut the engine off at the office and the car would sit for hours before I used it for lunch or before heading home.

Not sure I'd blame the longer crank time on fuel pressure. Don't recall paying much attention to my Hellcat in this regard -- I mean there was the occasional longer crank time but I never really made any attempt to diagnose the cause for this (and I may have believed it to be due to lower battery power and not due to low or inadequate fuel pressure) and thus not having any reason to delve into this behavior any deeper.

But of course you can.

You need to find a way to power the car, and this includes the fuel pump, short of actually attempting to start the engine. Perhaps with your foot off the brake pedal push the start button once (or maybe twice) to energize the car's electronics/electrics with the idea this also causes the fuel pump to run -- ideally you would want to hear it run -- which should ensure adequate fuel pressure before you cause the engine to crank. If you can do this then you can see if this affects the longer crank time.

 

[ceebydeeby710]

In my experience, there isn't a combustion engine out there that doesn't take a little more crank under warm/hot start conditions

 

[Himmelkat]

My GUESS would be if it is really hot outside, then something in the fuel may be vaporizing and forming bubbles, which messes with fuel delivery of an injection system, unlike carburetors that emulsify the gasoline WITH air bubbles to help it atomize more explosively when it is in the booster venturii.

 

[BigDaddyEureka]

Rockster is on to something with the time needed to refresh the battery. I had to make several little hops moving the car around while reworking my shop recently and it was definitely sluggish to start later on. Lots of weird happens with these when the electrical power is low. When stored for the winter I keep it on a trickle charger - and I think I may do that more often.

 

[TampaSRT]

Not a battery issue. It gets driven daily and cranks hard, just doesn't fire right away.

 

[ALongGuy]

How many miles? When my other Mopars take a little longer to start it’s time for some Techron.

 

[TampaSRT]

How many miles? When my other Mopars take a little longer to start it’s time for some Techron.

200 Miles, brand new. Only on the lot for 2 days off the truck before I bought it.