have a 2003 with 60,000 miles. truck is starting to roll over alot more than it should before starting. check power at glow plug controller and has power coming in and out. has power at glow plugs and at intake heater element. truck runs great and gets 20 plus mpg. only other thing is it is starting to smell a little rich and sound a little different than it used to. put a fresh fuel filter on and didnt make any differnce. the colder it is the more it rolls over before it fires. any suggetions before taking it in. it is all stock. if it was injectors why is it hard to start when cold instead of warm. does not smoke at start up at all when cold or warm. if it is burned out glow plugs does it throw a code

How old are the batteries

I dont think it will throw a code for just one burnt out plug, altho, i could be wrong. I use power service in my truck and I think the cetene rating increase helps on cold starts. I went without it for a tank and can tell its slightly harder to fire at 20*

Where did you check the power to the glow plugs? The strip of metal that connects them tends to rot after the FIRST one. So it rusts in two and one 1/8 glows are powered. Sucks.

strips of metal are both good. sounds to me like it is losing prime somewhere but i have a no visible leaks what so ever.

just get new batterys

Won't necessarily see fuel leaking out, system is under vacuum until after CP3. What do you have at the bleeder? Must be perfectly clear of bubbles or you'll have problems, in my limited experience.

Won't necessarily see fuel leaking out, system is under vacuum until after CP3. What do you have at the bleeder? Must be perfectly clear of bubbles or you'll have problems, in my limited experience.
primed it tonight and the primer was very soft and had to pump it several times to get it hard. it did seem to roll over less times. will check the bleeder tommorow and check for air. do i check for air before priming it or after at the bleeder?

primed it tonight and the primer was very soft and had to pump it several times to get it hard. it did seem to roll over less times. will check the bleeder tommorow and check for air. do i check for air before priming it or after at the bleeder?
batterys are original and have never had a issue with them.

Remove bleeder, push primer gently and watch for any bubbles. It should flow perfectly clear and the bubbles are real easy to see. If it bubbles at all you've got air getting in.
Then the fun begins!
I got lucky because mine was leaking at the filter heater fitting beside the primer, when I pushed the primer with the bleeder closed fuel would seep out and actually spray if I pushed harder.