Electrical Issue?

[jdarther]

Hello all. Here is the issue; 2017 Ecodiesel with 122k miles that is deleted. I am the second owner, and it was deleted when I bought it. Had the truck since 20k miles. Everything with the truck is awesome aside the the problem I am describing now. Here is the history of what has lead to this post.
- About two years ago, on a cold start, when I put the truck into reverse, the rpms dropped below 500 into what I can only describe as a limp mode. Would not move. after taking time to think, figured out it was the battery. Replace the battery, all is good.
- About one year later, same thing happened, but battery was healthy. Figured out if I would brake/gas it together a little, put it in gear, all was great. And, of course it was the alternator. Had someone replace the alternator (not an OEM), all was fine.
- Now, I am having a similar issue. But here is the difference. If I start my truck, let it get to 13v, brake/gas into gear all is good once I get moving. While the truck is still not to normal running temp, I shift into neutral at lights or stops, brake/gas when I start moving. Once I have run the truck for about 20 minutes, the 'lag' goes away and I have no issues. Everything else is great. I drive about 60 miles each way to work and getting 27-29 mpg. Everything else works great. Anyone have any thoughts. I did have someone a test on the battery and alternator that showed no issues (what they said). I do see that the battery is 69% for the state of charge. Had one person say that the alternator has to be a Mopar or there are issues.

 

[jdn112011]

Hello all. Here is the issue; 2017 Ecodiesel with 122k miles that is deleted. I am the second owner, and it was deleted when I bought it. Had the truck since 20k miles. Everything with the truck is awesome aside the the problem I am describing now. Here is the history of what has lead to this post.
- About two years ago, on a cold start, when I put the truck into reverse, the rpms dropped below 500 into what I can only describe as a limp mode. Would not move. after taking time to think, figured out it was the battery. Replace the battery, all is good.
- About one year later, same thing happened, but battery was healthy. Figured out if I would brake/gas it together a little, put it in gear, all was great. And, of course it was the alternator. Had someone replace the alternator (not an OEM), all was fine.
- Now, I am having a similar issue. But here is the difference. If I start my truck, let it get to 13v, brake/gas into gear all is good once I get moving. While the truck is still not to normal running temp, I shift into neutral at lights or stops, brake/gas when I start moving. Once I have run the truck for about 20 minutes, the 'lag' goes away and I have no issues. Everything else is great. I drive about 60 miles each way to work and getting 27-29 mpg. Everything else works great. Anyone have any thoughts. I did have someone a test on the battery and alternator that showed no issues (what they said). I do see that the battery is 69% for the state of charge. Had one person say that the alternator has to be a Mopar or there are issues.

Is there an actual problem, ie stalling while on brakes in gear? Or are you just bothered by the idle rpms you're seeing?

 

[jdarther]

When the ‘lag’ happens, vehicle will not move and about half the time stalls. If I am quick to shift to neutral, it will slowly recover to a normal idle.

 

[jdn112011]

When the ‘lag’ happens, vehicle will not move and about half the time stalls. If I am quick to shift to neutral, it will slowly recover to a normal idle.

I'd assume these run an idle air control valve like any tbi but I'm not 100%. In my shitbox Days that would be the go to for your typically stuttery/stall at idle.

Yours being only in gear though there's a chance your torque converter is failing and losing it's stall point for disengagement. Is there any other driveline shutter or between shifts? How many miles on the vehicle? Has your transmission ever been serviced?

 

[jdarther]

I'd assume these run an idle air control valve like any tbi but I'm not 100%. In my shitbox Days that would be the go to for your typically stuttery/stall at idle.

Yours being only in gear though there's a chance your torque converter is failing and losing it's stall point for disengagement. Is there any other driveline shutter or between shifts? How many miles on the vehicle? Has your transmission ever been serviced?

122k miles. Transmission serviced at 60k. No other issues. To be honest, runs like a top aside from this weird quirk.