2006 D2500 AUTO BONE STOCK 47,000 MILES STARTED LOPING AT HIGH IDLE ONLY THIS WINTER, SEEMS TO DO THIS AT FIRST COLD START IN THE MORNING. PRE-FILTER IN TANK WAS CHANGED 3 MONTHS AGO, FILTER AT ENGINE WAS CHANGED AT THE SAME TIME, BOWL SUMPED EVERY 5TH FILL-UP. NO CODES SHOWING AT DASH.
WOULD LOVE TO HEAR WHAT YOU GUYS THINK. FIRE AWAY

 

Fill out your sig please... Is this truck in Mexico or Alaska? Maybe wax in the filter? Have you put a bottle of fuel conditioner in yet?

 

Truck Located In Ft.worth Texas , Average Altitude Is 718 Feet.

 

Well it has been unseasonably cold in texas... As diesel cools the waxes gel in it, and I don't suppose you have winter fuel in Texas. Did you put a conditioner in yet?

 

I Have Not Added Fuel Conditioner Yet, Will Tonight.

 

Was this with the automatic high idle (1000 rpm) or using the manual high idle controlled with the cruise controls (1100 - 1500rpm)? If the latter, it is perfectly normal and it happens intermittently.

 

Mine doesn't lope on high idle! I can set it anywhere and it doesn't lope.... Cold, warm, mine is smooth like the tach needle is welded in place....

 

Not a problem. I have heard of this on several trucks before. Dosen't hurt anything, just sounds cool...

 

IT ONLY LOPES AT THE AUTOMATIC HIGH/COLD IDLE, DOES HAVE AN INTERESTING SOUND TO IT, LIKE IT WANTS SOMETHING TO DO IN A HURRY. AS SOON AS YOU TOUCH THE BRAKE OR GAS PEDAL IT GOES BACK TO IDLE WITH NO FURTHER LOPING (OR ANXIETY)

 

Mine has not loped while in the auto high idle. Not sure that is normal.

 

kill the cap locks brother. yellin at everyone or your just as excited at the truck on cold mornings? LOL


Welcome to DTR

 

A lot of people say 'normal' but mine doesn't either, smooth as glass. Don't know what it might be but I wouldn't like the lope. Sounds kind of like a slight difference in fuel volume between the injectors that would show at low RPM and be lost in higher ranges.

 

I've got the same "lope" and trust me, it's more annoying than cool. It also started this fall (@74,500 miles) High idle enabled, 5 micron filter, powerservice additive, winter fuel, clean air filter.....I checked everything. I drive the crap out of it so I ruled out carboned up nozzles. Took it to the Dealer (still under warr.) and convinced them to order new injectors. I'll post with the results. Anyone else?????

 

My 07 with 38000 miles loops on the auto high idle has done so since new and quite frankly my truck seems to have a lot of symptoms a lot of people have that seems to think something is wrong with truck but it starts up every morning and gets me were i need to go without any trouble i was so bad at worrying about the truck almost traded for an 09 6.4 ford till wife ask do u really want to trade truck and the last 3 weeks been enjoying it more just not worrying just drive.

 

Mine does it intermittently on manual or auto High-Idle.

This morning it was 34 degrees, I started her and manually activated H/I to 1200RPM's and she would go through cycles of loping and normal...Normally if she lopes it's constant until I shut off H/I.