Rough Idle

DaddyKaddy

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Current Ride
2013 GMC Sierra 2500HD Duramax
Current Ride #2
1986 Camaro IROC-Z
Anyone else notice their RHO having a weird idle like it's about to die then goes back to normal over and over? Went on a 200 mile round trip, when I got home to unload the truck it was doing it. Just hit 577 miles so I figured that was the sweet spot to shit on me 😂
 
Mine did it one time while carefully going through a touch less car wash... thought it was gonna stall. Hasn't done it again
 
Mine did it one time while carefully going through a touch less car wash... thought it was gonna stall. Hasn't done it again
That's what I'm hoping, it was -30 windchill and I had filled up with Costco 91. I hear conflicting reports that their gas sucks but idk
 
That's what I'm hoping, it was -30 windchill and I had filled up with Costco 91. I hear conflicting reports that their gas sucks but idk
I thought their gas was quality 🧐 I’ve only ever used that in my Hellcat and had no problems
 
That's what I'm hoping, it was -30 windchill and I had filled up with Costco 91. I hear conflicting reports that their gas sucks but idk
Same as far as temps go. My first, and only, dead battery was a night where it was ambient -20 out. No damn clue why I live here
 
Same as far as temps go. My first, and only, dead battery was a night where it was ambient -20 out. No damn clue why I live here
Because it kept the clowns away until the oil field hit. Now it's cold as F*** and we have a revolving door of asshats... honestly not sure why I live here either 😂
 
I’ve noticed the battery voltage drops at idle and if the auto stop is off. Idk if that could cause the truck to idle weird but my battery voltage will bounce constantly from like almost 12 to just over 14.
 
I’ve noticed the battery voltage drops at idle and if the auto stop is off. Idk if that could cause the truck to idle weird but my battery voltage will bounce constantly from like almost 12 to just over 14.
Could be, I was outside the truck and didn't think to check voltage. I turn auto start/stop off after I start the truck. I would do more testing but it's been negative nutz freeze everyday since and future cast shows negative 600 kelvin so she is not going out
 
Anyone else notice their RHO having a weird idle like it's about to die then goes back to normal over and over? Went on a 200 mile round trip, when I got home to unload the truck it was doing it. Just hit 577 miles so I figured that was the sweet spot to shit on me 😂
Mine does that occasionally once the high idle comes down. Shifted into reverse this morning and it sounded like it almost stalled. Only does it right after a cold start then it’s fine. Has done this since I got it. I now have 1,300 miles on it. Going to have the oil changed soon and have them make a note of it for possible PCM update. I haven’t had other issues with mine yet other than the blind spot monitors are extremely sensitive when it rains. Hopefully that’ll be a software fix as well.
 
I’ve noticed the battery voltage drops at idle and if the auto stop is off. Idk if that could cause the truck to idle weird but my battery voltage will bounce constantly from like almost 12 to just over 14.
You see my post about charging your batteries? If so, have you tried it? Fixed my issue permanently...thus far
 
I put mine on a battery tender everytime I put it in the shop
 
I put mine on a battery tender everytime I put it in the shop
Have you taken a multimeter to it to verify your full charge is actually at capacity? It should test over 14.75. I found my AUX battery full to be an amp shy of capacity.
 
Have you taken a multimeter to it to verify your full charge is actually at capacity? It should test over 14.75. I found my AUX battery full to be an amp shy of capacity.
No but I definitely should
 

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