Ok I got a 03 f250 cc fx4 6.0 automatic trans. It is bucking and jerking really bad at about 50-60 mph or on hills. (Feels like it not getting enough fuel) It idles pretty smooth only does it when you mash the fuel pedal mainly around 1500rpms. I have had it on a cornwell tech force computer and at the ford dealer on the computer no codes. I have checked fuel pressure at idle it is 64psi at 1500 Rpm's it's 64psi I have put a scangauge ii in and have some numbers off of it aswell. EOT 168. fWT 166 map is 14.2 BARO is 14.4 KOEO ICP is 639-642 at idle IPR is 22.5 at idle no misfires on injectors ,
Parts I have proven bad and replaced FICM, blue spring in fuel pressure regulator, #6 injector,changed engine oil, fuel filters, transmission fluid, transmission filters, transmission temp sensor, i have dropped and cleaned fuel tank, it was at ford dealer yesterday getting latest and greatest flashes on PCM, FICM, and TRANSMISSION if there are any more number y'all would like to see just let me know and I will get them

 

man your EOT and fWT temps are way low try a new thermistate

Did ford do a cylinder balance test???

IDK if the SGII misfire is accurate

I take it nothing came up on SG about EGR Gauges and does it now that its been reflashed

have you cleaned the egr valve and or tried unplug when off and then go for a ride to seee if condition still persists

 

Curios did the SG give an actual missfire count or ???

other people have had troubles with it

 

Yeah the temp is running low this morning on my hour drive to work 45 outside it didnt get above 150 this evening it warmed up to about 70 and it ran around 170 I don't know about the cylinder imbalance "my wife took it up there" I think all they did was pulled codes of computer and reflashed it. would have to unhook battrie cables for it to know it's been reflashed? I have cleaned the EGR and replaced orings I did get some EGR readings off the scangauge not at home where I can get them rite now but should be there with in a hour if I'm not mistaken it was The EVM and EVD that I got working best I recall at around 1500 Rpm they were both 0 going up to 4 sometimes I will get them for sure when I get home in various Rpm's

 

You think the cat could be stopping up? I'm going to check it when I get home after I get those numbers

 

ya that thermistate is stuck open

for proper combustion 190* is optimal

 

If you want to check the cat I beleive they undo/backoff the bolts at the joint right before it and go for a ride


the turbo veins maybe gummed up from the combustion/thermistate issue or clogged the cat

 

I got a vgt code on the scangauge I'll get that one to I'll get a thermostat put in it my cat has a slip joint behind it haven't noticed one in front but I sure hope one is there

 

EVD 0 EVM 0 at idle VGT 64 at idle VGT 51 at 1500 rpm 47 at 2000 rpm ok at idle VGT went from 64 to 85 then all the way down to 15 then back up all in about a minet I'm going to try the EGR code again since the flash and see what I get. I got a 0 on the cam/ crank sync that be a bad cam position sensor?

 

I am getting a EGR reading 0 at idle I am going to make a few trips down the road and see how it does

 

Ok trip around the block and down the interstate
1500rpm
EVD 6. VGT 51
EVM 6. EGR 27
1750 rpm
EVD 5. VGT 55
EVM 5. EGR 30
2000rpm
EVD 7. VGT 50
EVM 6. EGR 30
3000 rpm
EVD 11. VGT 39
EVM 18. EGR 43
70mph 2000rpm cruise on
EVD 1. VGT 52
EVM 0. EGR 30 - 2
IA2. 92
fIA. 57
EOT 157 fWT 154

 

03 truck suspect icp sensor and connector,

 

Cheezit. I really don't know what is good and bad as far as readings go. My icp at idle reads 641 and my IPR is 22.5 at idle

 

look at koeo voltage should be .14-.19v
look at back of drivers side head from under the and see if there is an oil leak from that area.

 

I have pulled my CAT back just to make sure it wasn't stopped up started the truck up and thats not the problem still got a stutter. is it possible to have a dead injector and not throw a code? Even tho I have 64 psi of fuel does that automatically mean I have enough fuel flow? Or could I still have a flow issue? The reason I'm asking it will set her and idle all day and never miss a lick but you can touch the fuel pedal and it goes to acting up? I am completely stumped