OK....here's what it's doing...

[027.3]

Here's a short vid of what my truck is doing (if this works) when I start it, after it smooths out it still runs rough. Anyone know why my truck is running like this??


http://www.youtube.com/watch?v=f2pU-DHJVXY

[BIGBILL105 45]

HPOP going bad? Is it setting off the SEL?

[NCHornet]

Sounds like a typical GP system issue. Have you followed my troubleshooting instrucyion located in the sticky in this section? I would start there. This isn't a HPOP issue or it would never start that fast!!!

NCH

[BIGBILL105 45]

Originally Posted by NCHornet

Sounds like a typical GP system issue. Have you followed my troubleshooting instrucyion located in the sticky in this section? I would start there. This isn't a HPOP issue or it would never start that fast!!!

NCH

Welp, scratch my idea off lol.

[choupique108]

Id say glow plus and thick oil. My truck does the same thing just not near as bad.

[NoRalPh]

I call that "galloping" and have only heard my truck do it a couple of times when it's really cold (single digits F and "sat" for a few days in it) and my trucks GlowPlug system is working right I think....

So, sounds like yours needs attention to be galloping when it's not really cold enough to cause it.

Go to that Sticky!

[injection direction]

Does the motor smooth out after a couple of minutes?

My truck does this when it is cold outside (under 45 degrees F or so) and then smooths out nicely after about thirty seconds.

Your truck sounds a little different than mine, I think. It sounds to me like the injectors are not getting adequate oil. I assume you have fresh oil and OEM oil filter, fresh fuel filter, and fresh tank of fuel. If the answer to any of those is no, I would give them a shot.

I always do these inexpensive (have to do anyway) things first just to eliminate the obvious.

[tnfastbusa]

your icp is bad my truck done the same thing and then it went out put a new one in and it stop

[sldghamr]

the bouncing is probably caused by a bad IDM or bad ICP. the rough idling my just be cuz it's cold.

[NoRalPh]

OMG!!! Guys, HPOP - IDM - ICP????

Let's not start throwing parts at this

027.3, goto the GP sticky and follow the procedure for checking your relay a plugs First.....

That "smooths-out" very quickly and is Most likely a GP issue. How cold has is gotten recently where you are? Did it do this when it was warmer?