1996 Pontiac Firebird Owner's Manual - Page 134

Have you recently changed brands of fuel? Engine Oil Pressure Gage This gage tells you if there could be a problem with your engine oil pressure. If so, be sure to fuel your vehicle with quality fuel (see "Fuel" in the Index). Poor fuel quality will cause your engine not to run as efficiently as designed. You may notice this as stalling after start-up, stalling when you put the vehicle into gear, misfiring, hesitation on acceleration or stumbling on acceleration. (These conditijons may go away once the engine is warmed up.) This will be detected by the system and cause the light to turn on. If you experience this condition, change the fuel brand you use. It will require at least one full tank of the proper fuel to turn the light off. If none of the above steps have made the light turn off, have your dealer or qualified service center check the vehicle. Your dealer has the proper test equipment and diagnostic tools to fix any mechanical or electrical problems that may have developed. The engine oil pressure gage shows the engine oil pressure in psi (pounds per square inch) in the United States, or W a (kilopascals) in Canada, when the engine is running. Oil pressure should be 20 to 80 psi (140 to 550 kPa). On the 3800 engine the oil pressure should be between 20 and 120 psi (140 to 827 kPa). It may vary with engine speed, outside temperature and oil viscosity, but readings above the red area show the normal operating range. Readings in the red area tell you that the engine is lowon oil, or that you might have some other oil problem. See "Engine Oil" in the Index. 2-85