Starting Problem, Rough Idle

[CrW917]

My 2012 with the 5.7 HEMI is having some issues.

Symptoms: - The engine will crank, but won't turn over, and the key will get stuck in the Start position until I turn it myself.
- It does two things when it finally starts, it either bogs down after a couple of seconds no matter what I try. Or it will finally start up, but then has a rough idle.

Its throwing no codes, battery, alternator, and starter were all tested , and all passed.

The ICM was my first thought, but any time I've dealt with that on other vehicles, it throws a code.

I'm new to this whole ETC thing, as any truck I've had before this has always had the throttle cable. And to my understanding, there are a lot of things that could trigger the ETC to malfunction..

Has anybody ever dealt with this same problem and found the solution? Or would anybody have a good idea of where I could start? Any help is appreciated.

 

[Brandon-w]

Have you had fuel pressure tested? If it was etc thered usually be a red lightening bolt on your dash. Anything I've ever seen go wrong with etc will put you in limp mode almost instantly. Maybe a crank position sensor? Do you have a code reader?

 

[BenWade]

A million possibilities. Start by checking the throttle body to make sure it isn't sticking??

Sent from my SM-G965U using Tapatalk

 

[CrW917]

Have you had fuel pressure tested? If it was etc thered usually be a red lightening bolt on your dash. Anything I've ever seen go wrong with etc will put you in limp mode almost instantly. Maybe a crank position sensor? Do you have a code reader?

The red lightning bolt is on when I turn the key to thebbn ON position, but it goes away after about 5 or 6 seconds, or when the truck starts. I never noticed it before the problem started. Then again I may have just not noticed because I didnt see any problems.

 

[CrW917]

Have you had fuel pressure tested? If it was etc thered usually be a red lightening bolt on your dash. Anything I've ever seen go wrong with etc will put you in limp mode almost instantly. Maybe a crank position sensor? Do you have a code reader?

I do not have a code reader. I had Autozone check it and they said nothing came up. Thiugh he recommended going to an actual shop as their code readers just check for the basic stuff.

 

[Brandon-w]

I do not have a code reader. I had Autozone check it and they said nothing came up. Thiugh he recommended going to an actual shop as their code readers just check for the basic stuff.

Yeah with a shop code reader you can see if you are getting vacuum or have a vac leak. You can check to see if your crank sensor is reading correctly many things. Sometimes trucks are weird and have a code but it doesn't Come up on the dash.

 

[RamCares]

My 2012 with the 5.7 HEMI is having some issues.

Symptoms: - The engine will crank, but won't turn over, and the key will get stuck in the Start position until I turn it myself.
- It does two things when it finally starts, it either bogs down after a couple of seconds no matter what I try. Or it will finally start up, but then has a rough idle.

Its throwing no codes, battery, alternator, and starter were all tested , and all passed.

The ICM was my first thought, but any time I've dealt with that on other vehicles, it throws a code.

I'm new to this whole ETC thing, as any truck I've had before this has always had the throttle cable. And to my understanding, there are a lot of things that could trigger the ETC to malfunction..

Has anybody ever dealt with this same problem and found the solution? Or would anybody have a good idea of where I could start? Any help is appreciated.

Hello CrW917,
We certainly understand why this would be concerning! If you're not able to determine a solution based on suggestions from fellow forum members and you decide to address this with your dealer, please let us know via private message. We would be more than happy to provide you with an additional layer of assistance for that process.
Laura
RamCares