Sounds like you might have a plugged catalytic converter. If it is, the exhaust at the tail pipe will sound more like a hissing instead of the normal "putt putt" sound. If you work the throttle under the hood, you might hear some popping through the intake / throttle body, especially at higher speeds.
A failing MAP sensor can cause bogging too. On the older cars from the late '80s and early '90s, it commonly caused the engine to stall when the accelerator pedal was held steady. The engine would continue to run, (poorly), as long as the gas pedal was moving. That sensor can fail to report the correct manifold vacuum readings but as long as its signal voltage stays within its acceptable limits, (0.5 to 4.5 volts), no fault code will be set. A quick check for the MAP sensor is to disconnect the plug. The Engine Computer will recognize the failure and substitute a known good value to run on based on approximations from the other sensors. It still won't run well but if it runs better, suspect the sensor. The MAP sensor has the biggest say in how much fuel enters the engine.
Monday, November 21st, 2011 AT 2:48 AM