Engine/Transmission (1994 - 1998) runs rough

[Speck]

1995 ram 2500 165000 miles 5speed --when temp outside is just a little cold--- fires right up but shakes bad and smokes (white)
until warm--acts like engine miss--if it is a bad injector (leaking over night) what is the easiest way to find it--thanks for any help

 

[GAmes]

Loosen one injector line at a time and see if one of them doesn't change the idle. Note..it will be messy.

 

[The patriot]

Get a long screwdriver and listen around.
That should narrow it down to an area.

 

[DonFitzwater]

Use a hand held temp gun and shoot each portion of the exhaust manifold and see if one or two of your cylinders aren't firing (look for the cold ones)

 

[DieselRyan]

Depending on fuel pump timing (which I'm assuming is still factory set), a bad grid heater could be an issue. if you had a leaking injector, the engine may not start or have a lot of black smoke when driving. Assuming an injector is leaking and not overfueling.

 

[Missouri Mule]

What is your idle when ac on. I think if you have defrost on you that you should be able to set idle.

 

[Speck]

outside temp has to be below 50 to run rough otherwise runs fine, just slight miss on first hard acceleration -- let off runs great--no change with ac--I have
done so little to this truck---(killer dowel pin)--1 clutch -- 4 inch exhaust-- rebuilt trans --added 4th gear lock nut --and rebuilt transfer case ( trans and transfer case my fault--loaned out truck and will never do that again!!!) oil change every 4to5 thousand - fuel filter every 20 or now since I retired 1 a year I'll wait till it gets cold outside and try your suggestions thanks speck

 

[Woodenhead]

Does it do it mainly when you wind it up cold with little to no boost pressure? There's a good chance you need to check you're timing and maybe advance it a bit. Typically with time the factory timing will "slip", cold stumbles are a symptom of this. There's a few other benefits to bumping the timing as well.