I am having a problem with my truck stalling when I stop "like at a light" which I hoped was the plugs etc. It is weird because it only happens every once in 20-30 stops. There are other times it seems like it is going to die " rpms drop super low" but then it will idle up "surge" and come back to a normal idle. Also when it dies it will fire right back up and idle fine.

I also noticed yesterday my dash lights slightly brighten when applying throttle, could an alternator that is starting to go cause this "doubt it"?

My thoughts are crank or cam sensor but I have no codes popping up. If I need to start a new thread I will

I have changed all plugs, wires, cleaned tb, replaced air temp sensor.

 

I'm thinking your IAC may need a good cleaning or just replaced. its a simple swap, only issues is, buy oem, forget the autoparts store

 

What engine? Cam and crank, would not allow it to restart.

 

Brent has a 03 Hemi if I remember correctly.


On every other Dodge engine prior to 03 SuperDak would be right about the IAC, but our throttle bodies on the Hemi are electronic and Throttle Position, Idle Air Control & Cruise control are all eliminated and made into one non serviceable system, so more or less it may be the electronics inside the throttle body causing the issue, in which case you would need a new throttle body.


One thing to check when it happens is to look in the bottom right corner of your gauge cluster and see if you see a red icon with a lightning bolt going through the center of it, that's the throttle body trouble light [*\].


Personally I would suspect the throttle body electronics or a vacuum leak. A crank sensor is a hall effect sensor as is the cam sensor, they detect magnetic force and usually they work or they don't you don't get half *** operation out of them theres too much consistency in their operation for it to be bad one moment and perfect the next time you start the vehicle, in my experience with them theres really no in between "sort of works", I'd look elsewhere in the meantime with almost 100% confidence.

The lights surging is an alternator regulator issue, or a ground issue. An electrical surge or power issue can most certainly cause grief with the electronic throttle body, it is an electric motor that controls the butterfly. If it is a ground issue it will be the two main grounds that ground out on the frame below the battery (trace the small battery ground wire coming off of the main negative wire) and the one that grounds on the fender, also check for corrosion below the fuse box terminals. Those are the two grounds that will cause whacky symptoms to happen that make no sense in diagnosing.

 

Could be as simple as cleaning the throttle body.

 

Yes, start to clean your tb

 

I would also double check all ground connections, I just had 2 bad grounds in on GMC 2500 and the truck would go straight fine but would not back up truck would shut off in reverse.

 

I will check grounds, I did notice one of them was in need of TLC when I was doing the plugs. I cleaned TB with no change. I have an 05 1500 with 5.7