low end throttle response bog/ delay

[sledhead_24_7]

I have got real bad low end throttle response bog / electronic delay. When you matte the throttle to the floor the truck barley moves. It just goes baaaaaaaaaaaaaaaah for about 2-5 seconds then at around 15 mph it takes off like a rocket till about 60-65 mph then falls on its face.

Also when I am hooked up to a trailer the bog is worse. When on the stock tune file hooked up to a trailer in soft dirt the truck will bog down and quit moving forward. It just boggs down loses rpm and power then wont rpm more than 1800 rpm and refuses to spin the tires even in 4x4 low. When tuned to the 275 tune this is lessened but not cured. A real pain, especially when I spend an hour or two stuck in a field. Because the truck just quit moving.

The truck is a 2008 job 1 f350 3.73 gear ratios, 4x4, crew cab long box lariat single wheel, 20" wheels. intake and dpf/ cat with 4" exhaust. 46,000 or so miles dpf deleted since 30,000.

I don't think it is turbo lag as the boost gauge shows 10-15 psi and the engine rpm is around 1800-2000 rpm. I am thinking this might be a problem with the tranny or torque converter. there are no check engine lights or anything.

I have been wondering if this could be part of the reason while I am not getting any milage or very good power form the tunes ( not what they should be anyway)

It does not seem to be tune specific as the bog is there when stock or on the 275 hp tune.

Any ideas would be a great help. If this is a ford problem (which I think it is) then I could conceivably get it taken care of. If not oh well just want ideas of possible problems so I can finally get the performance and milage that these trucks are capable of.

Thanks guys

Also something to check out www.deedsengineering.com
They build a dual flange V- band kit for they exhaust. This kit will make it very very fast to rr the dpf delete parts or stock exhaust in the event that it needs to be done. They currently have up to 3 1/2" and should have a 4" kit some time in the next couple of weeks. At least that is what they told me on last monday the 27th of april.

[brad g]

Originally Posted by sledhead_24_7
Quote:
Originally Posted by brad g
hey when your stomping on it and it goes blaaaaaaaa are you getting any smoke out the pipe?

Oh yea lots and lots of smoke but no go

sounds like the little turbo is stuck wide open might be carboned up like the old 6.0 when the vgt sticks major lag then huge power
__________________
brad

Lariat black and tasefully chromed, 3.73s , crewcab shortbox 4x4 every option, 35x12.5r35 TOYO opencountry MT on factory 20s, afe stage 2 with modified air ducting to draw from the fender badge.
spartan 150 175 210 275 tunes flo pro cat / dpf delete, fast idle, 6 100watt spot flood lights mounted in bumper, black out tint.

[sledhead_24_7]

Could be, as I also get a loud metal to metal squeal from the turbo area. Once the noise starts it will keep on doing it until you let off the throttle. This noise is most pronounced when coming down hill off of teton pass which is around 3000ft of elevtion worth of 10 -12% grades. The truck has been making this noise since around 12,000 miles before it got tuned

But acording to Ford there is nothing wrong. They told me to drive it till it blows up Real good advise huh:mad: They could could not even get the noise to happen. Wonderful ford shop.

[brad g]

Could be, as I also get a loud metal to metal squeal from the turbo area. Once the noise starts it will keep on doing it until you let off the throttle. This noise is most pronounced when coming down hill off of teton pass which is around 3000ft of elevtion worth of 10 -12% grades. The truck has been making this noise since around 12,000 miles before it got tuned

But acording to Ford there is nothing wrong. They told me to drive it till it blows up Real good advise huh:mad: They could could not even get the noise to happen. Wonderful ford shop.


??????WTF???????? take it back to ford ....before you blow the engine up.. ythe bearings in the small tubro are prolly packed in take the boot off the small turbo and spin the compressor wheel see if it moves freely it should spin by itsself for at least 5 seconds ... listen and shine a light in there and see if you see damage... if it doesnt spin take it back right away... when turbos go evertything else gets damaged to .. you dont want that... take it to another dealer if the one you go to wont work on it ... or call customer service and complain untill they will fix it.

[brad g]

call me when you going to work on it i can walk you threw it if you like ...

780 742 1558

brad.

[sledhead_24_7]

I will look at the turbo today some time.

As far as ford customer solutions center they pretty much told me to go pound sand. Dealer has been trying but does not want to get stuck with the bill plus they don't know as much as they think they know about they 6.4s. next nearest dealer is 100 miles away and they told me the same thing. so kind of stuck.

[brad g]

I will look at the turbo today some time.

As far as ford customer solutions center they pretty much told me to go pound sand. Dealer has been trying but does not want to get stuck with the bill plus they don't know as much as they think they know about they 6.4s. next nearest dealer is 100 miles away and they told me the same thing. so kind of stuck.

go over the dealers head and call customer service and tell them, and keep calling untill you get the truck fixed, trust me the will fix it you just have to be persistant.

when you spin the compressor wheel and it sticks grab it and see if there is any shaft play toward you and away and up and down there should be very little to none and the compressor wheel should not contact the housing at all check for damaged blades, scratches , discoloring due to heat ... your going to see some oil because of the breather off the oil fill ... take pics ...

6.0/6.4 Fuel Economy:
Ford vehicles equiped with the 6.4 PowerStroke diesel are not rated for fuel economy by the EPA. If economy is in question, a boost test should be performed. If boost reaches 22-25 PSI in third gear, wide open throttle under load, then th engine s operating normally and no economy related repairs need to be performed. If not in specs, then the engine will need to be diagnosed--check sensor reading, VGT and EGR operation, fuel pressure and quality, crankcase pressure, intake or exhaust restriction, exhaust or CAC leaks.
Fuel economy will be affected by many factors, including: excessive idle time (one hour equals approxmately 33 miles of driving), fuel quality and blend, ambient temperature, driving habits, vehicle use, towing, loads, add-on accessories. Broadcast Message 1271, 4450, 6989 compliments of the dieselmans page

[sledhead_24_7]

call me when you going to work on it i can walk you threw it if you like ...

780 742 1558

brad.

will do, Thanks for the info.

[sledhead_24_7]

Brad g

I took off the intake boot coming from the air cleaner to the turbo. Looked at the fins they look ok I think. The turbine spins for around the 5 sec with a little push of the finger. The leading edges are all polished off and shiny with the rest of the blades looking black in color. No visible nicks or dings.

[sledhead_24_7]

checked the end play and up and down movement, there is none. working on pic from cell phone , being difficult.

[brad g]

give me a call 780 742 1558

[sledhead_24_7]

hopefully the pics come through

[brad g]

looks good ... but both turbos nee to be checked the other one takes some time.... first check and see if the linkage from the soliniond to the turbo moves freely .. there should be a very slight resistance but it the action should be smooth shouldnt be sticky ... dont pull to hard just an easy gentle movement check that then call...

[sledhead_24_7]

will check the linkage next. also in the process of loading up the 250 tune again that Matt revised for me about 1.5 months ago.

Thanks again for the help and info, David

[sledhead_24_7]

should the linkage move easy when the truck is turned off or with the motor running?

Because with the motor off it is not moving, don't want to reef on it though.

[brad g]

should the linkage move easy when the truck is turned off or with the motor running?

Because with the motor off it is not moving, don't want to reef on it though. it shod move with the truck off nice and smooth with not haveing to force it at all .... thats your problem thats the vgt control it shouldnt be stuck .... go to ford and yell you cna also try moving the lr lubing it up .. i dont think that will help but you can try..

[sledhead_24_7]

it shod move with the truck off nice and smooth with not haveing to force it at all .... thats your problem thats the vgt control it shouldnt be stuck .... go to ford and yell you cna also try moving the lr lubing it up .. i dont think that will help but you can try..

just a double check, this linkage in the pic right?

[sledhead_24_7]

just a double check, this linkage in the pic right?

I was pulling a bone head move a bit ago. I was trying to move it while the DD was reprograming the ECM. As soon as I turned off the key and checked it again it move just fine. Ooops

[brad g]

lol one thing at a time lol...... take the truck for a ggod romp when you have the tune reloaded and let us know how it is ...

[brad g]

I was pulling a bone head move a bit ago. I was trying to move it while the DD was reprograming the ECM. As soon as I turned off the key and checked it again it move just fine. Ooops


thatas the linkage when you pul it all the way and let go it should return on its own and the action should be very smooth. have you reinstalled the tunes latley?

[BansheeStroker]

Mine was just doing the exact same thing as you are describing. Almost felt like it was stuck in a high gear or something took it in and ended up being a broke egr valve. The told me that it was broke bad enought they had to replace the housing and everything anyway got it replaced went ahead and did the latest flash while i had it in and all is well. Just got the new tunes from scott and still runs great no bog at all.

[sledhead_24_7]

been driving it around for the week the delay is still there, but not as noticeable. Plus when I get on the throttle from a stop in pulls fairly hard at 3/4 throttle up to about 60 mph then falls on its face. If I go full throttle all it does is blow smoke and not go any faster or pull any harder. It has always been this way on the higher HP tunes, the truck actually feels faster on the 175 or 210 tune believe that or not.

If I had a broken EGR valve wouldn't it show a check engine light?

What ever could be going on is more than likely making me get the 10-11 mpgs or less that I get.