Truck Starts And Drives Fine But Once It Warms Up It Dies And Wont Start For A Few Hours..

Posted in Internal Engine Parts

I have a 2003 Dodge Ram 1500 3.7 V6

The mornings are my favorite part of the day. This is because it’s when I know my truck won’t be giving me problems. That is until the truck starts to warm up. I have no problem when the truck starts for the first time, but when I drive it for a little while the RPM’s will start to fall and it’ll feel like its chugging when I’m driving on the highway. If I come to a stop after it started chugging it will most likely die. It always starts right back up if I turn it on immediately. I have a lot of errands to run during the day, so if the truck gives me problems and I park it I have to wait a few hours until it will start again. I should mention that when it wont start it is cranking but thats it..

My error codes are telling me I have a bad crankshaft position sensor, and I’m also having an Ignition Misfire, but it’s not specific where.

I’ve already replaced all of the spark plugs, Crankshaft Position Sensor, two of the distributor coils, checked all of the fuses, and the fuel pump, fuel pressure, and cleaned the throttle body.

I’d love to take it to a mechanic and have the shop solve my problems but I can’t afford the repair charges at this point in time.

I had a friend come over the other day and look at my truck. We took out one of the distributor coils and one of the brand new spark plugs and when we cranked the engine the was no spark coming from the plug..

There are 4 Answers for "Truck Starts And Drives Fine But Once It Warms Up It Dies And Wont Start For A Few Hours.."

    1. Philip says:

      I do not know how a Dodge is but GM has a base that the coil packs mount to. They have a bad habit of going out.

    2. indianaangel66 says:

      My vehicle was doing the same thing and i was told it could be from either a Vacuum Hose or the cadillaic (spelling) converter is clogged.

    3. section hand says:

      Spark Plug wires and or Coil breaking down under Heat;
      I Replaced Spark Plugs on 98 Cougar and The Spark Plug Wires- Road test Two miles started to miss and Died, I did get Home;The Wires were Auto-zone Duralast;I started to look at other things,this car had been parked for two months, I went back out at 10 P.M. Started the car,raised the Hood and looked at coil and Wires( 5 of the Spark Plug Wires were Jumping Fire,I removed all and returned them to Auto-Zone, They gave me another set,The V 8 Cougar Road Test Good;All that to say this when You replace Spark Plug Wires ,Take a closer look at wires;–If You had said problems when starting I would be Looking at Fuel—I say Your Problem is Electrical;
      The Problem as You have stated it ; My first Look will be Spark Plug Wires and Coil, When these are weak , car starts ok. but then starts to Miss as Eng reaches operating Temp,

    4. dbmaxwell1 says:

      I don’t know about the newer Dodges but on older trucks there is an ignition box. When they started to go bad one thing they would do is exactly what you describe.