miss at idle

[odieub]

ive only had this truck for a month now first powerstroke. Early 99 auto 185k with superchips tuner. When you come to a stop about 99 percent of the time it acts like it is running on 7 cylinders you can tap the gas to ramp up the rpms a little and it may clear up not always. When you drive it though it runs flawless. The only thing that has been done different in the last few days is i changed the oil 2 quarts lucas the rest rotella 15w-40 and i did notice after about 100 miles of driving when you shut it off and went to restart it now starts instantly. But it is very hard on a cold start start and then die? its been about 20' in the am up to about 35 or so during the day. could the oil be to thick and causing the miss and you can drive it for an hour and it still does it. I don't think that it done this when i bought the truck but not 100% sure

[twildman]

Change the oil and take the Lucas out of it, run only Rotella, or Delo 400.

[odieub]

changed the oil no lucas this time logged about 100 miles today after the fact still doing it. you cant hear it around the motor but you can hear the miss in the exhaust pipe faintly and even feel the truck shake a little in the seat but like i say any rpms and it goes away totally. not check engine light, no smoke nothing any1 else with any ideas?

[ns954]

Have you changed the fuel filter yet?This might be a good time to start a regular regiment of injector cleaner/fuel supplement such as PowerService or Stanadyne.Might need to have a cylinder contribution test to see if you have a halfway dead cylinder.

[odieub]

changed fuel filter about 1000 miles ago and run some stanadyne through it end of last week. about 32' or so degrees this morning like to never started with white smoke everywhere would take no fuel for about 5 min like to have not pulled out of its tracks. but in fifteen min no smoke only the slight miss at idle up to about 1500 rpm then runs like a champ.

[6.0STROKER]

try the cam sensor, i had one go partially retarded on my old rig...at idle it was missing under a load it ran fine.

[odieub]

i have wandered that too but ford done the recall last tuesday. ?

[odieub]

well pulled the fuel filter tonight nasty looking and some water. i guess it went to the injectors. till it warms up it will white smoke like crazy now when it gets warm runs fine. shouldn't if the injectors are bad they run crappy all time?

[mschn99]

sounds like a bad injector to me...

[asammons]

Were you able to identify the problem? I think I may be experiencing a simiilar issue - white smoke (smells strongly like unburned diesel) at idle and feels like it's missing. Acceleration is good and smoke seems to go away once engine is under load.