1997 528i intermittent loss of power
I started having some issues with my car this morning. As I was cruising down a highway, the car suddenly lost power and started decelerating regardless of throttle position. It went away after 5 seconds or so and the car drove fine until I reached a gas station. Since my fuel gauge isn't working, I decided perhaps I ran low on fuel but after gassing up with 12 gallons I knew this was not the culprit.
This symptom of losing power continued throughout the day at varying intervals and with varying duration 5-15 seconds. The car stalled twice while moving but restarts just fine after shifting to neutral or stopping.
I read a bunch of threads on similar symptoms and started by cleaning the MAF sensor. I also hooked up an ODB live data scanner to see if the coolant temperature isn't getting elevated (it hovered around 210; my cluster temp gauge does not work correctly either) but I don't think my model has any fail safe mode which would cut the power to save the engine.
The one thing I did notice in the OBD data feed was that MAF seemed to show the correct air pressure during the power loss while the fuel trim readings would spike up to 25+ and return to normal when the power came back.
Would it be safe to assume that my fuel delivery is at fault? My plan is to replace the fuel filter then go after the pump.