High revs at stop?

[SHTUPNFISH]

Anyone else had this issue? Mine has only done it 2 times. Only in drive, when stopped at a traffic light, the engine is revving like 1200 RPM's. I shift to nuetral and it drops to 800. All at a dead stop. Very wierd.

[dustindiesel]

i believe that is 'turbo surge'...if u look it up im the forum it should help with gittin u answers...good luck

[Turbodude]

well i don't know much about them but it could be that the engine is going into regeneration mode...i know the engine revs up to raise EGT's and there are secondary injectors in the particulate filter that burn off the carbon built up. I was always under the impression that it only did so in park idling...but who knows mabe it does it whenever

[dustindiesel]

oops..didnt see it was a 6.4l

[gaotcheye]

NOT VERY WEIRED. The engine was trying to do a re-gen of the DPF at the wrong time. It should have stopped the re-gen when you dropped below 35 mph or if it was in park when you applied the brake. The first time my truck pulled this on me was on a wet street approaching an intesection and caused my steering axel to lock-up and slide just before i wnet thru the intersection after i stopped the engine remained at 1200 rpm for about 20 seconds then dropped back down to normal. in the last year this has happened about 15 times the truck has been in the shop 7 times for a total of 2 months the techs are unable to duplicate the problem and the ECM has no fault codes stored. Ford's factory engineers claim 1) i must be pressing both pedals at once 2) must be using the wrong fuel. I got the truck back last week Ford has installed a black box with a panic button so that hte next time the engine fouls up i might possible capture the problem. They don't understand that this happen only when the engine decides it wants to mess-up. DON'T LET YOUR GAURD DOWN AND DON'T LET FORD TELL YOU THAT THEY ARE NOT SEEING THIS PROBLEM ON IT'S OTHER 6.4 ENGINES LIKE THEY ARE TELLING ME.

[TwinTurboStroker]

Originally Posted by SHTUPNFISH

Anyone else had this issue? Mine has only done it 2 times. Only in drive, when stopped at a traffic light, the engine is revving like 1200 RPM's. I shift to nuetral and it drops to 800. All at a dead stop. Very wierd.

Its regeneration mode no worries

[gaotcheye]

Originally Posted by TwinTurboStroker

Its regeneration mode no worries

I know it's regenaration. But not at speeds less than 35 mph and not when you have your foot on the brake. There is something not functioning correctly.

[SHTUPNFISH]

Yes, the truck was only 1 month old and I had not a clue about regeneration. But, this thread is almost 1 year old...

[F250John]

I got the some problem but when i put it in park it revs high around 1500 rpm one time it got to 2000 rpm but it goes back down to normal idle when i put the brake And i only had it for 3 months

[TwinTurboStroker]

Originally Posted by gaotcheye

I know it's regenaration. But not at speeds less than 35 mph and not when you have your foot on the brake. There is something not functioning correctly.

What do you mean not at speeds less than 35 MPH and when you have your foot on the brake? The truck will do regen at all speeds including idle....when you hit the brake it will drop down to 800RPM, but if your sitting with the brake for longer than 30 seconds the idle will start to go back up

Originally Posted by F250John

I got the some problem but when i put it in park it revs high around 1500 rpm one time it got to 2000 rpm but it goes back down to normal idle when i put the brake And i only had it for 3 months

The truck probably wasn't seeing the correct EGT's to do a complete cleaning of the DPF, so it kicked up the revs...........either way regen mode can be scary if you have no idea about it