Ummm yeah... little help.. (free beer for the one who helps solve) - Ford Powerstroke Diesel Forum
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  #1  
Old 08-20-2013, 11:47 AM
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Exclamation Ummm yeah... little help.. (free beer for the one who helps solve)

Okay guys, 00' f350 cclb 4x4 auto 259K miles 100% stock except for the 6638 mod
8
im maxing out on boost (WOT) at about 13 lbs (mechanical gauge "t'ed off the maf line) and 8 lbs from the bully dog gt tuner (not using the tunes just using it for gauges)

installed the tunes for grins and giggles and i can easily hit 25 lbs (gauge and 17 lbs on tuner) like right now without a second look then un-installed the tunes, and back to low levels of boost

No tunes normal light driving (not hammering it) i have some light smoke (black) but not much...

boost seems to lag quite a bit but then when it spools it maxes out at 13 lbs maybe 15 if i really push it hard at WOT.

no check eng light.. but I am still throwing the following codes when i wanna pull them

P1249
P1211
P0470
P0475
P0478


Have no Idea where to start looking... still pulls great but i know shes not pulling like she used to.... already looked... no exhaust leaks anywhere, and zero blow by or pressure under the oil cap. (aka blow by)


so heres what im thinking
bad or leaking CAC (charge air cooler - intercooler)
injector problems?
low HPOP oil?
boost leak at the blue boots (pass side boot at the CAC is oil soaked it appears, but could be just road grime) - let me know if pics will help and ill get them


Back ground info:

all oil changes done at 3500 miles
mostly highway miles
all filters changed every 7K (oil filter at service)
run a jug diesel klean every 500 miles
pulls a 3K lb. tilt deck car hauler trailer occasionally with a friends honda (track car)
Full Gauges + elec Tuner gauges
still has foil on the intake ---- how does de-foiling help the motor btw?---
only MOD is the 6638 - rear diff cooler
stock exhaust


and lastly... now that I have a pyro... where should i set my defuel at on the 7.3 so i dont damage my motor....


thanks for the input and help ahead of time guys....

if any of your input helps Ill make sure you all get a beer on me....


Gunny

Last edited by GunnyRappUSMC; 08-20-2013 at 11:52 AM.
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  #2  
Old 08-20-2013, 08:23 PM
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I'm going to say your turbo impeller wheel is pretty rough looking if you haven't checked yet.

Doing the foil delete just makes the turbo whistle louder in the cab.

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Old 08-21-2013, 04:22 PM
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i no i no...your running a 663"8" when you should be running a 663"7". Your not getting enough air...

I'll take CORONA's, please..thank you.
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Old 08-22-2013, 09:25 PM
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thanks guys... yeah I meant 6637 mod not the 6638 (typo) ill try looking at my turbo wheel and see how it looks (should i inspect cold side or the hot side? just wondering)... could it be a bad EBP sensor? and its throwing everything else off...


and yes im serious free beer... Ill send a walmart gift card with money on it that you can go buy beer with ! ! ! !
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  #5  
Old 08-23-2013, 02:13 AM
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What are you getting for EGT's during your runs and how long?

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Old 08-23-2013, 08:35 AM
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im in the same boat, man. Low boost, and cant find the symptom. Just ordered a set of bellows nd gonna start a trial/error til i find out why.
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Old 08-23-2013, 10:19 AM
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i had a similar problem with low boost.

first look at your firewall for black soot from the up pipes.
if there is soot your looking at replacing the up pipes. Riffraff diesel sell them. excellent replacement.

next your going to want to look at your turbo wheel, you can pull off the air filter and use a flashlight and look down the intake tube.

another thing i would try, this is what i did to hear if my turbo had a problem.....
start truck, while in park spool turbo and then turn truck off and listen for the turbo to decelerate and it should be a smooth sound. if you hear metal on metal you might need a journal bearing or you can replace the center cartridge for more money. i went with center cartridge just because it has new exhaust impeller and compressor wheel.

center cartridge
Riffraff Diesel: Garrett GTP-38 Turbo Center Cartridge

journal bearing
Riffraff Diesel: Garrett GTP38 Journal Bearing Rebuild Kit


but yes, you could just have a boost leak.

another thing is that the EBPV could be stuck. and not allowing the exhaust to flow freely. one way to check to see if it is messed up is to look in valley of motor and if there is alot of oil your EBPV inside the pedestal is leaking.

rebuild kit
Riffraff Diesel: Exhaust Back Pressure Valve Piston Rebuild

i hope this helps.



semper fi
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  #8  
Old 09-07-2013, 02:34 PM
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Fix it???

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  #9  
Old 09-17-2013, 09:09 PM
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I have a feeling we aren't going to see any beer out off this one either.

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  #10  
Old 09-17-2013, 11:28 PM
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Quote:
Originally Posted by hucorey View Post
I have a feeling we aren't going to see any beer out off this one either.

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here ya go... I think its your best chance
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