Need help

[nick laethem]

Hey guys I have a 2012 ram 1500 with a 5.7 hemi. My truck was running great until Wednesday morning it started loosing power and shaking badly and when I would come up to a stop light the engine would stall out. I had to rev it up to about 2500 rpm to keep her running. She was running very rich. The codes that are popping up are multiple misfires detected, cylinder 3 misfire, Air temp sensor high voltage. I changed out the air temp sensor, swapped the coil packs, changed all of the spark plugs which were all fouled out. I also changed the crankshaft position sensor. I pulled the valve cover off to make sure it’s not a lifter issue everything is working as it should. Nothing seems to be helping I am truly lost on this one. Do you have any ideas what it could be?

 

[Brandon-w]

How good is your battery. Bad battery with cause all Sorts of unexplainable nonsense.

Sent from my SM-G981W using Tapatalk

 

[nick laethem]

Battery is good had it load tested before winter. Problem just started suddenly without any warning

 

[Livinalittle]

Might sound weird but, I've had some strange issues in the past on previous trucks that were caused by a loose ground wire on the firewall. If it's not something obvious I would start looking for what's free before I throw money at the problem.

 

[nick laethem]

Will check that tomorrow thank you

 

[2012RAM1500RT]

Any more codes after changing all of that, believe me I understand getting frustrated but it sounds like you've ruled out the mechanical things. I know I'm of little help but look for the simple things, walk away if you get frustrated and come back and search more.

 

[Livinalittle]

Good luck man. I hope for your sake it's something small that just needs to be found.

 

[nick laethem]

Well when we unplugged the throttle position sensor there was a lot of codes that came up because of that. I’m starting to wonder if the ECM went bad and needs to be replaced

 

[NJMOPAR]

Check the connection at the TIPM for looseness/corrosion. Not sure if there's a hard reset procedure for the ECM but might be worth researching.

 

[jws123]

I would clean all connections un hook battery for a hour or so and start fresh plug a scanner in and see what comes up.

 

[nick laethem]

Update on the truck we did a compression test and cylinder 3 had 0 compression upon further inspection we discovered that the exhaust valve spring had broken. Went and got a new spring but in the process of removing the old spring lost one of the valve keepers so I’m at a standstill until I get more from the auto parts store in the morning. So once I get that put back together I will do a compression test on all of the cylinders and find out what the numbers are. If any of the other cylinders are low compression it looks like we may be doing a top end rebuild of the engine. It’s been brought to my attention that the 2012 hemis with active cylinder management are known for dropping lifters and scoring the camshaft.