po171 and po174 obd2 codes
#3
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#8
It shouldn't take three key cycles to get it up to pressure, but stranger things can happen, I guess. Did the pressure bleed off pretty quickly (within a minute or two) with the engine off?
#9
When you open the throttle, vacuum drop out, which closes the pressure regulator. If you take the vacuum line off the regulator while the engine is idling, the fuel pressure should jump by about 10 PSI. Also, see if there's fuel in the vacuum line.
#10
i see alot of folks guessing at misfires like fuel pump go take a reading from the fuel rail then see