2008 dodge 4500 power surge
 

Hey y'all im new to the site but have been lookin through for some time now.
I have a 2008 dodge 4500 with a 6.7 around 240000mi on it. Changed the batteries in it a few months back, shortly after doin so the truck started to pulse all the time, not just when the grid heater is operating but all the time!!! This is frustrating :argh: its been to a dealer and a diesel mechanic a few times each and no one can figure it out :humm: tried the alternator had batteries checked replaced the fuse block, disconnected the grid heater and still nothing. Looks like i have an interceptor package installed for the lights...
Has anyone else come across this problem and if so what was done to fix this i really dont want to loose this truck to a dealer for a couple months

welcome to db have you tried to completely unhook the grid just to rule it out for sure i know you say it does it all the time but maybe it could be getting false readings from a failing sensor telling the grid to fire up. seen this happen on an early fuel injected truck. truck would run fine for about 5 mins. then wouldnt pull its self. it was 90 degrees out. temp sensor was telling the computer it was like -40 and it would start choking its self and run like crap. just something ez double to check

Thanks... is that the plug at the bottom of the intake? Also should i completely disconnect the solenoid for it....is the sensor part of the grid heater or is it external somewhere

it has a nut that holds the wire on if i remember right it is towards the cab from where the intake horn bolts . think its a 10mm wrench to pull the nut off

cool thanks...when i get into work tomorrow ill take another peak