What causes an engine romp on start up?

[icysmooth]

What could cause an engine romp in 80 degree weather on start up?
Oil is new and up to level,always wait for start lite to go out,clean fuel filter,ICP replaced middle of last winter.CPS done under recall.
Is my HPOP going out?
Could a CPS also cause this?
Tested all glow plugs and relay and all are fine.
Any ideas?
Thanks!

[Dietoremain]

injectors...tired.

[Jarrod B]

is this with a warm engine or cold?

[Super Diesel]

Originally Posted by Dietoremain

injectors...tired.

Seconded... The "romps" are caused by weak injectors. I've got them too. Using a heavier oil can make them worse (supposedly) and using a lighter oil can make them better (again, supposedly)--however using lighter oil is just masking the problem, not fixing it.

[zpd307]

my truck romped for a second or two the other day for the first time since i have had it, got it in april. it was the first start of the day and cleared up almost instantly. really caught my attention though, since it was the first time it did it. 208k mile on her though. almost seems like air intrusion on an old idi....

[Dietoremain]

mine only does it in cold weather now and then. i dont worry.

[CT Performance, Inc.]

It can just be tunes..little to much HPO

[icysmooth]

Great ideas so far-but my fault for not enough background-
So here goes-108,000 miles-never worked hard,bought from an older guy who "JUST" had to have a new 6.0and pi**ed cause dealer would only give him $20,000 for trade in-I offered $20,000 (2002)and he agreed so dealer wouldn't put back on lot for $28.
Anyway-truck had never towed anything until I bought it-had 60,000 miles when bought,always changed oil @ 3,000 miles,fuel filter every 10,000 miles.
Only does it when engine is cold.
Tunes have been in for 2 months and no problems till now.
Haven't drained fuel filter lately to see color-could o-rings on injectors cause this?
Just let me know if more info is needed!
Thanks for the help!

[cj45lc]

Mine was doing just like yours, romp every so often on the first start of the day. I put 2 bottles of REV-X in a few weeks ago & have not heard it romp since, I have 180k on mine & think that the injectors may be a little tired. The 6.0 people been having good luck with the REV-X, so I thought I'd try it & the engine is noticeably quieter & seems to start a little easier. PHP is selling the stuff & Bill is going to dyno a 7.3 before & after, will be interesting to see the results.

[icysmooth]

Any more thoughts?