Hello new poster here. I have been wondering around DF for a long time but never posted before. But I have a problem with my truck and this is the best place to find answers. First off I have a 03 1500 5.7L 4x4. and I never had any problems since I bought the truck in 07. And I have no performance mods. But this morning when i was leaving work the truck was running fine for about 15 mins then started stuttering and lost all power. The engine started clicking and the ETC light started blinking. I pulled off the road and it took everything I had to stop the truck, I was only driving about 35 mph. After i stopped the CEL came on. The truck still runs but idles very rough and it still has no power brakes. I pulled the codes and all I got was P0300 and it does feel like its misfiring pretty bad. Anybody have any ideas on what could be wrong?
I appreciate any help. Thanks guys

 

My guess is a busted valve spring, pull the heads and take a look...

 

Right on Hammer maybe I will tear into it tomorrow if the wind stops around here.

 

That is exactly what my 03 did last month when it broke a valve spring. Was in a 25mph school zone when it just started missing.

 

It was a problem with the 03 Hemi's. Pull the valve covers and check them all. Personally, if you find a bad one, I would replace them all so you don't lose another one later down the road.

 

hammer, sad to say, that was my first thought also. Broken spring.

 

Good call Hammer. Pulled the valve cover and found a broken spring on the number 1 cylinder. Time for some new springs and possibly a valve job hopefully just springs though. Never replaced valve springs before. Wish me luck

 

Did you change the springs yourself Vtwin.

 

Check your PMs rojas069

 

Well parts are ordered. I ordered the 6.1 springs and rods. And the spring tool from Weedahoe. Thanks guys for all the help. I'm sure i will be asking for more help when the parts get here. I have a picture of the broken spring but cant figure out how to post it.