Originally posted by SVTCANUK: Nice private conversation we're having here. Anyone else want to chime in?
Okay!
Did anyone notice the fuel rail and fuel regulator?
Look at pic below.
Fuel Rail
The fuel rail (Figure 3) distributes low pressure fuel from the chassis supply line to each injector. Fuel pressure at the top of each injector is maintained within 1% of each other at all times; this is done with nearly symmetric flow paths. The fuel rail is also designed to have minimal flow restriction by increasing the cross-sectional flow area and reducing the flow path length. The fuel rail contains several other parts in assembly (PIA) components that perform crucial functions. These include:
-- Injection Pressure Sensor which measures the pressure of the fuel near the injectors. This signal is used by the EEC-V to adjust the injector pulse width and meter fuel to each engine combustion cylinder.
-- Engine Fuel Rail Temperature Sensor which measures the pressure of the fuel near the injectors. This signal is used by the EEC-V to adjust the injector pulse width and meter fuel to each engine combustion cylinder.
-- Low Pressure Solenoid Shut-Off Valve which isolates the fuel rail from the upstream fuel system when the engine is not operating. This minimizes the amount of fuel available to flow through the fuel injectors when the vehicle is off or leak from a damaged fuel rail during and after a crash. The valve is controlled by the EEC-V fuel shut-off valve circuit and contains an inertia switch. The valve is only on for one second after a "key-on" or whenever PIP signal are being observed by the EEC-V.
I'm thinking if that low pressure solenoid is there and we cut the power the car might think it's off....
Also to rule out the MAF unplug it while the engine is running. The car should skip a beat until the computer changes to default (limp setting). Then plug it back in (still running) and it should skip again.
ECT, IAT, MAF, and Crank Shaft sensor, all these must be working for the O2 to work properly.
