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post #11 of (permalink) Old 03-20-2019, 08:05 PM
klhansen
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Quote:
Originally Posted by saltypop View Post
Just ran codes from earlier run: P0475 still shows up saying Exhaust Pressure Control Valve
Try unplugging the EBP solenoid at the base of the turbo pedestal. That will prevent the electrics from closing the valve (short or otherwise). The two wires to the solenoid are Grey/red (powered from the PCM) and Black/white (ground). They are bundled together to go thru the 42 pin connector and to the PCM. IIRC, the PCM sends a pulsed voltage to the solenoid to close the EBPV. If the grey/red wire gets shorted to either a 5V or 12V signal, it'll slam the EBP shut. Might be a bugger to track down an intermittent short between circuits though.

Hope you can get it figured out.
Dave's suggestion of recording parameters with AE makes a lot of sense.

First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
'99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version
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