2012 Ram dies while slowing down

[Ed Kelly]

My 2012 hemi has done this maybe twice in the last few years but recently occurs almost daily. While coming to a stop on a service road, about 30-40mph and lightly on the breaks, the engine dies out. I’m able to throw it in neutral and it fires right up. Fuel level is never below 1/4 tank, so it’s not fuel starvation. Brake booster was replaced a year ago with an OEM part so I doubt it’s a vacuum issue. Truck runs fine other than the hemi tick. Has 237,000 miles on it. Any ideas?

 

[Mister Luck]

Fuel pump Relay ?
Or corrosion around the TIMP socket
You didn’t mention any codes did you scan the OBD2 port?

If you used the same hose off the brake booster it may look fine on the outside.

 

[GTyankee]

you need to have someone check both the
Crankshaft & Camshaft Sensors

 

[Lyle Longboat]

Does the engine cut out when you stop at stop lights/signs and sometimes won’t start after starting moments before. Say going in a store and coming out and no start?

 

[Lyle Longboat]

Also check the O2 sensors/starter if you check above mentioned and no change.

 

[Ed Kelly]

No present code but a pending code of P0420 which I don’t think would be related. The booster hose was reused and seemed to be in good condition. It hasn’t happened with aggressive braking- just like slowing down to a stoplight with my mom in the truck

 

[Ed Kelly]

Does the engine cut out when you stop at stop lights/signs and sometimes won’t start after starting moments before. Say going in a store and coming out and no start?

It hasn’t cut out if I’m already stopped. Only when I’m stopping and going 30-20 mph. I’ve never had a problem with it starting back up or starting in general. It’s like when the transmission is downshifting while stopping the RPM’s just fall to zero.

 

[GTyankee]

The https://www.obd-codes.com/p0420
is not likely your stalling problem
Read about it anyway

How to test a bad cam sensor

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=================================

2012 Ram 1500 5.7L Hemi Camshaft/Crankshaft Sensor Repair Advice

Good morning everyone, I hope you all are doing well. I wanted to see if I could get some advice for tackling this error I keep getting with the timing on the 5.7Hemi. Here are the things I have replaced so far. Year: 2012 Model: Outdoorsman Truck Mileage: 156,000 Crankshaft Sensor: Replaced...

www.ramforum.com

 

[Old Sarge]

Check your trans fluid level. Too low and the torque converter sticks in lockup mode and wont release when you slow down.

 

[DILLIGAF]

Do some Data logging.

 

[Ed Kelly]

Check your trans fluid level. Too low and the torque converter sticks in lockup mode and wont release when you slow down.

This sounds like what is happening but the fluid level is spot on.

 

[Ed Kelly]

Do some Data logging.

I’ve been driving around while logging but of course it hasn’t stalled out. Hopefully I’ll catch it soon.

 

[Ed Kelly]

Do some Data logging.

This is the frame before stalling, two frames with the engine stalled, and the last is the engine running again. Shows I was going 29mph when it stalled out and RPM's dropped to 0.


---------------------57 of 62 Frame---------------------

DTC_CNT 0



FUELSYS1 OL-Drive



FUELSYS2 OL-Drive



LOAD_PCT 25.5 %



ECT 194 °F



SHRTFT1 5.5 %



LONGFT1 6.3 %



SHRTFT2 5.5 %



LONGFT2 7.0 %



MAP 3.5 psi



RPM 814 rpm



VSS 29 mph



SPARKADV 27.0 °



IAT 86 °F



TP 14.1 %



O2SLOC B1S12--B2S12--



O2B1S1 0.900 V



SHRTFTB1S1 3.9 %



O2B1S2 0.470 V



SHRTFTB1S2 99.2 %



O2B2S1 0.880 V



SHRTFTB2S1 3.9 %



O2B2S2 0.450 V



SHRTFTB2S2 99.2 %



OBDSUP OBDII



PTO_STAT OFF



RUNTM 284 sec



MIL_DIST 0 miles



EVAP_PCT 0.0 %



FLI 97.6 %



WARM_UPS 4



CLR_DIST 43 miles



EVAP_VP -1.538 inH2o



BARO 14.1 psi



CATEMP11 1456 °F



CATEMP21 1456 °F



VPWR 12.986 V



LOAD_ABS 0.0 %



EQ_RAT 0.999



TP_R 6.7 %



AAT 81 °F



TP_B 16.9 %



APP_D 8.2 %



APP_E 3.9 %



TAC_PCT 6.7 %



---------------------58 of 62 Frame---------------------

DTC_CNT 0



FUELSYS1 OL



FUELSYS2 OL



LOAD_PCT 0.0 %



ECT 194 °F



SHRTFT1 0.0 %



LONGFT1 6.3 %



SHRTFT2 0.0 %



LONGFT2 7.0 %



MAP 14.1 psi



RPM 0 rpm



VSS 19 mph



SPARKADV 0.0 °



IAT 86 °F



TP 16.9 %



O2SLOC B1S12--B2S12--



O2B1S1 0.840 V



SHRTFTB1S1 0.0 %



O2B1S2 0.820 V



SHRTFTB1S2 99.2 %



O2B2S1 0.880 V



SHRTFTB2S1 0.0 %



O2B2S2 0.800 V



SHRTFTB2S2 99.2 %



OBDSUP OBDII



PTO_STAT OFF



RUNTM 284 sec



MIL_DIST 0 miles



EVAP_PCT 0.0 %



FLI 97.6 %



WARM_UPS 4



CLR_DIST 43 miles



EVAP_VP -1.939 inH2o



BARO 14.1 psi



CATEMP11 1456 °F



CATEMP21 1456 °F



VPWR 12.847 V



LOAD_ABS 0.0 %



EQ_RAT 0.999



TP_R 6.7 %



AAT 81 °F



TP_B 16.9 %



APP_D 8.2 %



APP_E 0.0 %



TAC_PCT 6.7 %



---------------------59 of 62 Frame---------------------

DTC_CNT 0



FUELSYS1 OL



FUELSYS2 OL



LOAD_PCT 0.0 %



ECT 194 °F



SHRTFT1 0.0 %



LONGFT1 6.3 %



SHRTFT2 0.0 %



LONGFT2 7.0 %



MAP 14.1 psi



RPM 0 rpm



VSS 8 mph



SPARKADV 0.0 °



IAT 86 °F



TP 16.9 %



O2SLOC B1S12--B2S12--



O2B1S1 0.820 V



SHRTFTB1S1 0.0 %



O2B1S2 0.780 V



SHRTFTB1S2 99.2 %



O2B2S1 0.860 V



SHRTFTB2S1 0.0 %



O2B2S2 0.800 V



SHRTFTB2S2 99.2 %



OBDSUP OBDII



PTO_STAT OFF



RUNTM 284 sec



MIL_DIST 0 miles



EVAP_PCT 0.0 %



FLI 98.8 %



WARM_UPS 4



CLR_DIST 43 miles



EVAP_VP -1.245 inH2o



BARO 14.1 psi



CATEMP11 1456 °F



CATEMP21 1456 °F



VPWR 12.693 V



LOAD_ABS 0.0 %



EQ_RAT 0.999



TP_R 4.3 %



AAT 81 °F



TP_B 14.5 %



APP_D 8.2 %



APP_E 3.9 %



TAC_PCT 4.7 %



---------------------60 of 62 Frame---------------------

DTC_CNT 0



FUELSYS1 OL



FUELSYS2 OL



LOAD_PCT 24.7 %



ECT 192 °F



SHRTFT1 0.0 %



LONGFT1 9.4 %



SHRTFT2 0.0 %



LONGFT2 9.4 %



MAP 2.8 psi



RPM 1484 rpm



VSS 2 mph



SPARKADV 8.0 °



IAT 86 °F



TP 15.7 %



O2SLOC B1S12--B2S12--



O2B1S1 0.920 V



SHRTFTB1S1 0.0 %



O2B1S2 0.920 V



SHRTFTB1S2 99.2 %



O2B2S1 0.920 V



SHRTFTB2S1 0.0 %



O2B2S2 0.940 V



SHRTFTB2S2 99.2 %



OBDSUP OBDII



PTO_STAT OFF



RUNTM 286 sec



MIL_DIST 0 miles



EVAP_PCT 0.0 %



FLI 98.8 %



WARM_UPS 4



CLR_DIST 43 miles



EVAP_VP -0.546 inH2o



BARO 14.1 psi



CATEMP11 1468 °F



CATEMP21 1468 °F



VPWR 12.801 V



LOAD_ABS 16.5 %



EQ_RAT 0.999



TP_R 5.1 %



AAT 82 °F



TP_B 15.3 %



APP_D 8.2 %



APP_E 3.9 %



TAC_PCT 5.1 %

 

[Ed Kelly]

I’ve noticed it’s happening only in the first few minutes of the truck running. Although it did happen once after the truck was already warm so I wouldn’t say it’s necessarily a cold start related issue.

Does anyone see anything in the logged data that means something?

 

[Ed Kelly]

Just happened again. Coolant temp was 194 so cold start theory is out. It was within the first few minutes of starting the truck after getting some take out. Still happened while slowing down on an access road going approximately 30mph.

 

[1999 White C5 Coupe]

My 2012 hemi has done this maybe twice in the last few years but recently occurs almost daily. While coming to a stop on a service road, about 30-40mph and lightly on the breaks, the engine dies out. I’m able to throw it in neutral and it fires right up. Fuel level is never below 1/4 tank, so it’s not fuel starvation. Brake booster was replaced a year ago with an OEM part so I doubt it’s a vacuum issue. Truck runs fine other than the hemi tick. Has 237,000 miles on it. Any ideas?

Have you checked the inside of the throttle body bore and butterfly valve?

If dirty, it will not permit enough airflow at idle (when you lift your foot from the accelerator pedal), and can cause a stall - even with the vehicle moving.

If dirty, clean the inside with spray throttle body cleaner.

 

[Ed Kelly]

UPDATE:

Along with experiencing the above problems I began having severe battery drainage. Swapped out my Optima Yellow Top twice due to voltage being too low for my charger to even recognize the battery.

THE FIX!

Fuel pump relay malfunctioning. Pump was staying on even with the key out of the ignition. Found this through tons of troubleshooting and stumbled upon this YouTube Video:

TIPM Fuel Relay Test and Bypass Solutions - Most 2007-2021 Dodge, Chrysler, Ram, Jeep, VW Vehicles

Visit https://verticalvisions.com to build your own, order from us, or obtain additional details. We do not sell these on Amazon. If your 2007-2021 Dodge, ...

youtu.be

I bought the TIPM Plug-In Relay System (Lite) and installed it on Saturday. Their website states all the other problems I was experiencing due to a faulty relay. No problems since and I haven’t connected it to the battery charger since installation.

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Took more time to unpackage than the actual installation. Hope this helps some of you!