Join Date: Sep 2012
Location: Central Valley, California
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Do you have gauges to monitor engine values??
P0263: contribution/balance: cyl#1
P0266: "---------------------" :cyl#2
Check harness for chafing make sure injectors are plugged in tight,try wiggling around harness to see if there is any change.
What is the FICM output?
Fuel filters been maintained?
Does it smooth out after it warms up?
P0403:EGR Control unit
P0404 EGR Performance range
P0405 EGR sensor low
Again look for wiring cuts-chafing egr plugged in tight.
Pull out the EGR and clean it, check o-rings for nicks-grease o-rings clean bore and reinstall.
P0500: Vehicle speed sensor
Trans actuator search/faulty/open circuit/short/low trans fluid Check harness coming down to transmission and check fluid level.
Check out charging system and batteries as well as all cables and grounds also get FICM values through all temps and speeds. If you have a scan-tool watch the desired and position of the egr valve, should be tracking along with the pcm,s disired position. That is as long as you still have one. lol
2006 F250 LARIAT CCSB 4X4: ARP Studs, O-Ringed Heads, X4 PHP Custom Tune, Atlas40 Ficm Tune, CAT EC-1 Coolant, IPR Coolant filter, Fass-125, turbo-back SS 4" pipe, Corsa muffler, No EGR , 6.4 Banjo's, 6.4 starter,DC Power 270 amp alt, 2/0 cables, Die Hard AGM, 7" lift w: Icon Progressive Coil Springs, 2008^ Carli/Deaver rear springs on fatty-daddy 38/15.50/18 Toyo's
Last edited by mhatlen; 02-09-2013 at 02:12 AM.