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Old November 15th, 2009, 14:47
joe_peters joe_peters is offline
NAXJA Forum User
Join Date: Apr 2008
Location: Grants Pass, OryGun
Posts: 13,746
Re: Fuel pressure question....

Look, something is amiss in the fuel system. You should read 49 psi with the engine running, NOT a fluctuating pressure. If the pressure is dropping then the injectors can't do their job--deliver enough fuel to the engine.

Repair the fuel pressure problem and your codes should go away.

Why your mileage is in the crapper with a lean condition is that the PCM is trying to compensate by increasing duration of the injectors' firing.
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