1995 Toyota Camry Feuel efficiency

Hi there,

These sensors are located in much the same place on all vehicles, (there will be some differences of course) O2 sensors are located in the exhaust between engine and Cat converter. MAF is located between the air cleaner and manifold (if used ) Fuel pressure regulator will normally be attached to the injector fuel rail, it will be vacuum operated. These sensors and others MAP sensor Air density, CPI, Cam sensor, are all non servicable. They are sensors with no adjustments and can only be tested with proper understanding of electric and with suitable equipment. Codes will tell us what sensor is not registering, not necessarily if it is faulty, the wiring and plugs can cause faults as can the ECU, so changing sensors just to see if it fixes a fault can be time wasting and expensive. You must test the entire circuit before making any decisions about what to do.

I hope that this is of help,

mark (mhpautos)

Well mark beat me too it by less then a minute! *Must have heard me typing*

the Heater control valve is located on the heater core hoses, but has nothign to do with engine performance just controls the heat.