2019 RAM 2500 with 6.4 l hemi issue

[Rmcnic]

Hi,
This past Sunday out with the truck and no issues. Parked that evening and went to fire it up Monday morning and cranked, but would not start. Not even a hint of ignition.

Checked all fuses in the TIPM, swapped relays, ran starter fluid into the intake and nothing. Used 2 different fobs, did a remote start and even a satellite start through UCONNECT. Battery has been checked and not an issue. Had a mechanic come out and he could not find anything after a comprehensive look for 3 hours. Could not get a reading from the ODB scanners (3 different units).

Got an appointment with the dealership (La Paz, Mexico) for this coming Tuesday and have arranged a tow for that morning. In preparation, I activated the neutral release mechanism to ensure it would be ready for towing. Just for fun tried turning it over one more time and it fired up for a few seconds. Tried again and it now ran, but at 4,000 rpm. Shut it down after 10 seconds.

I'm relying on the dealership to address it Tuesday, but thought I'd post in case anyone had any insight to this issue. Thinking it is probably tte ECM. Intermittent is not good as I'm way down Baja, Mexico (La Paz) and need to drive back through remote areas to the border near Yuma (1,300 km.). Could the 4,000 rpm. idle be the ECM losing its programming? Truck has 51,000 km.

Any feedback would be appreciated.

Thanks,
Rob

 

[Scram1500]

Battery has been checked but how old is it?

 

[Jeffjad]

You might have better luck finding your answer here.

Ram Heavy Duty Forum

Ram Heavy Duty forum, Ram 2500 and 3500 news and information.

hdrams.com

 

[vincentw56]

You might have better luck in the hdrams.com forum.

 

[theblet]

Batteries can test good on those cheap testers that autozone uses. If it’s 4 years old, might be a good time to swap it. Also check for a bad ground

 

[Brutal_HO]

Check and reseat all connectors you can. Check the underhood and any other grounds you can ID.

Not reading on the OBD is odd. It's not just the ECU there, lots of other modules.

Did you kick up a rock in the driver wheel well? There's a connector at the bottom behind the fender liner. Supplies power to the rear of the truck for several things including fuel pump.

As said, join us on Ram Heavy Duty Forum for more help.

P.S. The HD trucks don't use a "TIPM," it's a basic PDC with pluggable relays.

 

[Scram1500]

Also make sure the gas pedal isn't stuck under a floor mat, sounds dumb but easily overlooked

 

[Rmcnic]

Battery has been checked but how old is it?

It is the original battery, but jumped with another battery in parallel and still didn't fire. Voltage was over 14 volts at the time.