Stalling when cold issue? Any ideas what to try?

[tvizzle]

Heyall!

I have a 2012 Ram 2500 5.7L with a 2015 Ram 6.4 Intake. I did do the swap myself, so I'm not ruling out a forgotten plug somewhere, but it looks like it's put together!

It stalls out when it's cold. If I'm putting around the RPMs will surge a bit, and if I floor the throttle sometimes it'll die. Once she's warm, it runs fine.


I've checked vacuum lines. What else should I look at?

 

[1SloRam]

Throttle body clean?
Did you use 6.4 injectors?
Not sure if you need a tune after the intake swap or not.

 

[Fast69Mopar]

Throttle body clean?
Did you use 6.4 injectors?
Not sure if you need a tune after the intake swap or not.

A tune is not necessary after the swap if the correct parts were used.

@tvizzle, did you install the intake with the 5.7 fuel injectors with the spacers or did you use the 6.4 fuel rail and 6.4 injectors?

 

[tvizzle]

I used the 6.4 injectors and just flipped the rail around. It is tuned with an AFR w/ J Green. From his end, he said it looks like possibly an exhaust leak issue or a vacuum leak, but I've already checked that.

 

[RedSRT4Me]

I dont remember, I'll pull and double check.

I'm 90% sure I used the 5.7 injectors, with no spacer.

And there is your issue. You probably have vacuum leaks at the fuel injectors due to the spacing

 

[Fast69Mopar]

And there is your issue. You probably have vacuum leaks at the fuel injectors due to the spacing

That is almost certain. If you do not have the spacers installed you most definitely have a vacuum leak at the injector o-rings.

Do you have a set of spacers you can install?

 

[tvizzle]

I edited my last post instead of replying lol. I went out and checked real quick, I do have the 6.4L injectors, I checked the part number.

I pulled the fuel rail and turned it around, and then reinstalled. It's got a tune from J Greene with an AFR gauge and diablo tuner, so I don't think thats it.

It looks like you couldn't begin to fit the 5.7 injectors without the spacers lol.

 

[Fast69Mopar]

I edited my last post instead of replying lol. I went out and checked real quick, I do have the 6.4L injectors, I checked the part number.

I pulled the fuel rail and turned it around, and then reinstalled. It's got a tune from J Greene with an AFR gauge and diablo tuner, so I don't think thats it.

It looks like you couldn't begin to fit the 5.7 injectors without the spacers lol.

Have you asked Jay Greene for help? What is the AFR while the engine is running? Do you have your own scan tool so you can see what the map vacuum is? Or the fuel adaptive memory?

 

[1SloRam]

There was a post a few weeks ago with this same issue. He was Greene tuned as well.