Zero vacuum at fuel pressure regulator??? | Tacoma World
The 2.7 has an unusual style of operating the fuel pressure regulator. The vacuum line is not connected to a port on the throttle body. Instead it is connected to a port in the intake air chamber.
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P0441 Evaporative Emission Control System Incorrect Purge Flow
The code P0441 Evaporative Emission Control System Incorrect Purge Flow. What can cause it, symptoms, diagnostic, common problems and repairs
P0446 Evaporative Emission Control System Vent Control ...
The TSB for 1999 Toyota Corolla suggests replacing the ECM with an updated part as a repair for the diagnostic trouble code P0446. In some GM cars, a bad fuel tank pressure sensor also could cause the code P0446.
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Newer models, plug is under the steering column just poking out under the plastic panel. The paper clip thing doesn't work on the newer system, must have diagnostic tool.
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1990 Isuzu Trooper II 2.6 That Won't Idel Until It Warms Up.
Check your map sensor see if the vacuum line is soft, it may be sucking together causing this and if you can check your fuel pressure as follows.
SMART: ENGINE FUEL SYSTEM
The fuel delivery system provides the energy required for the engine thermodynamic process, supplies hydraulic power to the VBV, VSV and HPTCC control systems, provides hydromechanical amplification to the MEC and cools lubrication oil.
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