stumbling/bucking - Page 2 - Diesel Forum

**teamroper60** · 12-23-2009, 12:21 PM

Hot Shots Secret may well be the answer but I have doubts about it.. In the literature for that stuff, I see where they supposedly made it for and in conjunction with IH. Yet IH has yet to publish anything recommending the product to their consumers.. One would think that if it was made for IH and with their help, if it were really "the cure", they would at least acknowledge it's existence...

As far as I am concerned, until there is more data on the long term effects of the stuff or something from IH suggesting it as a viable solution, I will remain a cautious observer...

Just my opinion. You all do as you think best....

ZUNK · 12-23-2009, 12:36 PM

Ireally don't think I have innjector problems. I don't have enough symtoms. I will test it some more on my way home today, but it's odd to me that it only seems to do it between 1800-2000rpms. If you are accelerating quickly you won't notice it. You have to give ing it throttle in that rpm range to feel it. Thats why I asked about the cam sensor. It appears to be an rpm issue.

ZUNK · 12-23-2009, 05:26 PM

Just got home. 75mi. of hills. Ilearned it will do it above 2000rpm(I guess I must have backed out of it around 2000 in previous test). So from 1750-1800 on up it will do it. I even did it sitting still and giving it throttle. It doesn't have to be highway speeds either. If I drive slower to keep it in that range with out upshifting it will do it. Still no smoke and no other issues. In the higher gears I can let it get down to 1000rpm and give it the gas and it will pull smooth until I get to that 1750-1800 range. As soon as it cools off I will clean the EBP tube, MAP sensor tube and check the ICP.

dikkstarr · 12-23-2009, 06:53 PM

I have almost 1000 miles on my new oil with Hot Shots Secert in it.

I noticed a difference within the first 100 miles, however my truck wasnt having major problems. I did it for more of a prevenative maintanace thing.

My engine is running a lot better, starts easier, has way quicker response, turbo seems to spool faster, has more power when I stomp on it, and it even sounds better, a little quieter. Properly working injectors will make all this happen.

It seems to work for me and is working better the longer its in. My truck was getting lazy, maybe I saved myself some trouble by trying this stuff.

Doesnt it make sense that we need to clean the oil side of the injectors too instead of just replacing them when the get gooey?

dikkstarr · 12-23-2009, 06:56 PM

Quote:

Originally Posted by ZUNK

Just got home. 75mi. of hills. Ilearned it will do it above 2000rpm(I guess I must have backed out of it around 2000 in previous test). So from 1750-1800 on up it will do it. I even did it sitting still and giving it throttle. It doesn't have to be highway speeds either. If I drive slower to keep it in that range with out upshifting it will do it. Still no smoke and no other issues. In the higher gears I can let it get down to 1000rpm and give it the gas and it will pull smooth until I get to that 1750-1800 range. As soon as it cools off I will clean the EBP tube, MAP sensor tube and check the ICP.

I wonder if the tranny is confused and its acting wierd in the higher rpm range?

ZUNK · 12-23-2009, 08:24 PM

I have a 6spd dikkstarr. I found nothing wrong with EBP,MAP, or ICP sensors/tubes.

**teamroper60** · 12-23-2009, 08:30 PM

Quote:

Originally Posted by ZUNK

Just got home. 75mi. of hills. Ilearned it will do it above 2000rpm(I guess I must have backed out of it around 2000 in previous test). So from 1750-1800 on up it will do it. I even did it sitting still and giving it throttle. It doesn't have to be highway speeds either. If I drive slower to keep it in that range with out upshifting it will do it. Still no smoke and no other issues. In the higher gears I can let it get down to 1000rpm and give it the gas and it will pull smooth until I get to that 1750-1800 range. As soon as it cools off I will clean the EBP tube, MAP sensor tube and check the ICP.

Have you had it on a good scan tool that can monitor ICP and IPR duty cycle under those conditions? This almost sounds like it could be a lack of sufficient high pressure oil....

ZUNK · 12-23-2009, 09:19 PM

Thanks Teamroper, not yet. I'm going to order an AutoEnginuity in a day or two. I'll be sure to check those when I get it. What would cause that?

**teamroper60** · 12-23-2009, 10:46 PM

Quote:

Originally Posted by ZUNK

Thanks Teamroper, not yet. I'm going to order an AutoEnginuity in a day or two. I'll be sure to check those when I get it. What would cause that?

Weak or failing HPOP, stuck IPR, leak in the high pressure oil system.

ZUNK · 12-24-2009, 09:52 AM

Okay, but why only at certain rpms?. Thanks again.

**teamroper60** · 12-24-2009, 10:29 AM

The higher the rpms/load, the higher ICP should be (example: at idle, it only needs roughly 600psi, whereas at WOT it can be nearly 4000psi).

If you are not getting adequate ICP, it will affect fueling, particularly atomization, which will affect combustion.

ZUNK · 12-24-2009, 11:29 AM

That makes sense,except I can seem to get on the throttle hard and kind of power through it. I'm going to my inlaws shortly, so I will have more opportunities for testing when it acts up. I have only had this truck for two weeks. I want to change the oil/filter and fuel filters this weekend too.

stuntz954 · 12-24-2009, 08:12 PM

I have a 2003 Ex just bought it about 5 weeks ago. now mine is missing or bucking more like engine power cutting off and on very fast. I first noticed it when truck cold and better 1500 and 2000 in high gear and just giving a little throttle.

It feels like it is getting worse. i have replaced fuel pressure spring and removed egr. before this started.

I ran one tank before this started of the tech 2 stroke oil mixed with the fuel.

When the engine temp gets all the way up it seems to not buck / miss hardly at all.

I am glad someone else is working on this also. i will work on this also and post. i am in KY.

bubba macks · 12-24-2009, 09:50 PM

i have an 05 f 250 with the 6.0 now, but i had an 04 250 with the 6.0 and mine was having the same problems. it would buck real bad and want to shake at the same times yours does. i took it in and they trouble shot it down to the ficm. the changed it and it ran like a top. from everything that you wrote i think tahts whats wrong with yours. they had a recall on it, so if you believe thats whats wrong with it call ford and have them run your vin number to see if yours has the upgrade or not and if it dont take it in and have it done and it will either fix it or eliminate that part. good luck. i spent 1200 cause my vin number wasnt loaded yet when i fixed mine.

bubba macks · 12-24-2009, 09:51 PM

that is exactly what mine was doing and it was the FICM.