having issue with my '06 f250... tried to learn as much as I could and set up scanguageII... after having major work done over last two years (hpop, lpop. bullet proof egr, head studs, most gaskets including bedplate, heater blower, thermostat, rear cover seal, water pump and tons more) I just got it back and all of a sudden it doesn't have the power it had before and lost mpg in a big way... here's what I have set up and tested. The thermostat is running low--on the freeway between 183-186 can get it to 188-190 on city streets only...


Testing I did (these may change slightly because I just changed the hose to the MAP sensor as it had a crack, but need DH to drive so I can watch gauges... can give new values tomorrow:
When warm--186 degrees --while getting on freeway Punched it readings
VGT 35, BST 24
on straight of way @60 mph 48 VGT , 5.7 BST
stopped 71 vgt , .4 bst

After I changed hose these were read:
(using the codes provided by scanguage for settings using Ford 6.0)
KOLI MAP 14.9 EBP 16.8 BAR 29.9
KOHI MAP 15.2 EBP 17.2 BAR 29.8

Anyone that can help me figure out, I'd be happy to add more codes into scanguage if that would help...

Delta's were better after changing hose, 8-9 now...before they were 10-12, but since I can't get it to 190 degrees don't know how accurate these were.

I'm wondering if MAP sensor is bad or just thermostat...or what???

 

Map, baro and ebp look good. Thermostat is running a lil cool, should see 190+.

What work was most recently done? Also, how has mileage changed? (Before/after #s)

DH = designated hitter?

 

New tstat wouldn't be a bad idea.

2006 F350 4X4

 

@moneypit, dh= dear husband...he's at work. most recent work was bullet proof, egr, upper fan shroud, injection control pressure regulator, engine oil cooler kit, thermostat and housing, heater blower motor, blower cage, arp head stud kit, intake gasket, cover gasket, and various other gaskets, glow plug, o ring kit, stand pipe kit, @141,137 miles, got it back great power but leaking oil badly, back in shop 141, 171 miles...rear main seal kit and rear cover seal fixed, still leaking back in shop 141, 179 miles, bed plate seals and gaskets, drive belt, alternator, camshaft position sensor done, just got it home and no power... does this help?

 

@kdavid1, thanks, was thinking that, sucks that it was just changed Nov a few hundred miles due to testing, but thought it looked bad, but didn't know if MAP sensor was causing it to not close... should I go with Motorcraft again or try another company this time?

 

Not sure if the tstat is part of the power problem but its definitely not running warm enough to be efficient. Im one of the ones running a mishimoto 200° tstat and love it. I didnt have issues with the install but if you go that route buy the new Motorcraft tstat houseing just to be safe. Total will be pricey but to me it's worth it.

2006 F350 4X4

 

@kdavid1, saw that tstat online the other day and was thinking about getting it. thanks. new tstat housing added in Nov, less than 100 miles ago, can we use it or do we still need to replace it.

 

Dang, that's alot of recent work. Unfortunately, if a stock Ford thermostat was installed, that is a normal temp for it. Some people have installed the Mishimoto 200° stat to fix that issue.

It seems as if alot of parts were thrown at it hoping something would make a difference. All that stuff just doesn't go bad at the same time. Normally I would say take it back and have them fix it....but they'll probably just rebuild the transmission.

what is boost pressure at wide open throttle?

 

There is a good thread on here on it (very long) that money pit started--will give you alot of the good and some bad--but again for me no issues and am very pleased and would buy one tomorrow if I needed one--for what it's worth

2006 F350 4X4

 

Here's an Xgauge code that reads in psi (currently your reading inHg)

RXF: 046285140642
RXD: 3010
MTH: 001D00500000
NAM:BAR

Map, BAR, and EBP should all be within .5 of each other key on engine off.

 

@money-pit, thanks,yes it was, but did a lot because of oil leak and wanted it fixed, but didn't expect the loss of power, the boost pressure was 24 last night, but that was before i changed the hose, too much traffic for me to test without someone to watch scanguage, husband home after midnight and will take out then, as for the tstat, do you know if it was the Mishimoto MMTS-F2D-03H High-Temperature Thermostat, or the Mishimoto MMTS-F2D-03L Low-Temperature Thermostat--thinking it probably was hi, but want to order correct one, will put in myself when comes to save $...

 

The Mishimoto 200 high stat is what you want

man I don't know....why you would lose power after the last repair (basically oil leaks)
Unless....it's just a coincidence. Might also check ICP pressure at wide open throttle when DH gets home. Has fuel pressure been checked? Blue spring in fuel pressure regulator installed?

 

thought I'd read that somewhere before, will go and change that, the info given on xguage was different..

 

Is your FICM volts good?

2006 F350 4X4

 

Believe me, am so frustrated i could cry...want to be able to take trip to CO and would be dead in water after what I found trying to tow for a while...we went up to the coast this weekend and didn't face any of what we did bringing the 5th wheel back from OR to CA, it's not that heavy of a trailer either, 7k loaded..it flew bringing it home in April and then I had knee replacement so truck sat all summer...tried to tow in August and leak and it threw a code and fixed p0401 code and then when cleaning egr didn't fix and knew we had oil leak up high on engine decided to bullet proof... actually was great until they found that the oil leak wasn't the rear main seal and had to pull the engine because it was the bedplate, got it back an power was terrible..