0404 code - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 04-03-2013, 06:07 PM Thread Starter
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0404 code

2005 6.0 excursion changed egr valve intake not clogged but soot is kind-of greasy 208000 miles original egr cooler no coolant lose sometimes it runs rough .rpm s fluctuate 10-15 not much but concerning.can the egr cooler clog with soot?i am bulletproofing soon.egr valve is bostech has code p0404 what does this code mean

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post #2 of 5 Old 04-03-2013, 06:46 PM
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P0404 is a stuck or failed EGR Valve.

2011 F350 King Ranch DRW No Mods Yet

2003 Excursion Eddie Bauer 6.0l 4x4 | 2004 Intake | Zoodad Mod | Upgraded HPOP Cover | ARP Studs | OEM Headgaskets | Updated Turbo Feed-Drain Tubes | EGR Delete | Coolant Filter | Altas 40 | MKM Street Tune | Banks 4" CAT Back | Muffler Delete | High Idle Mod | Blue Spring Update | 6.4 Banjos | CCV Mod | Glowshift Gauges (Boost, Oil Press, Coolant Press, EGT, Volts, Fuel Press) | Rotella ELC | Rotella T6 | V/B Springs | Torque App on ASUS 10" Tablet |
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post #3 of 5 Old 04-03-2013, 08:48 PM Thread Starter
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What makes rpm fluxuate 10-15 rpms .2005 6.0 powerstroke
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post #4 of 5 Old 04-04-2013, 06:55 AM
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You wont be able to tell a 10 to 15 rpm change, maybe a 100 to 150 rpm change, definitely a 1000 to 1500 rpm change. Check your ICP with a scanguage or torque app and see if its giving sporadic readings.

2011 F350 King Ranch DRW No Mods Yet

2003 Excursion Eddie Bauer 6.0l 4x4 | 2004 Intake | Zoodad Mod | Upgraded HPOP Cover | ARP Studs | OEM Headgaskets | Updated Turbo Feed-Drain Tubes | EGR Delete | Coolant Filter | Altas 40 | MKM Street Tune | Banks 4" CAT Back | Muffler Delete | High Idle Mod | Blue Spring Update | 6.4 Banjos | CCV Mod | Glowshift Gauges (Boost, Oil Press, Coolant Press, EGT, Volts, Fuel Press) | Rotella ELC | Rotella T6 | V/B Springs | Torque App on ASUS 10" Tablet |
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post #5 of 5 Old 04-07-2013, 06:34 AM
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Quote:
Originally Posted by 6.0 excursion View Post
What makes rpm fluxuate 10-15 rpms .2005 6.0 powerstroke
Are you seeing this fluctuation on an insight, scangauge, or some type of monitor??? Is this at idle only, at a stop in gear, driving??? How frequent is this happening?

2004 Excursion Limited, 198,000 miles,
Edge CTS (Gauges only), ZooDad, Turbo Timer, DieselSite Coolant Filter,
RCD EGR delete, CCV reroute, Amsoil By-pass Filter, FireStone RideRite Air Springs,
FICM from Ed with Atlas 40 tune, No Kitty, FPR Blue Spring, DC XP270 Alternator


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