Surging is the condition where the engine power fluctuates up and down with a continuous, soft jerking motion. When driving at a steady speed, the engine seems to speed up and slow down, without moving the accelerator.
its run on road for 5 min then rpm fluctuates and quit, seems when engine is warmed...and will not restart till cool down.
2-stroke engine
Lower gears utilize the engine's power to slow down the vehicle by increasing the resistance on the engine, which in turn slows down the wheels. This is achieved by shifting to a lower gear, which increases the engine's RPM and creates more friction, helping to decelerate the vehicle.
The combustion cylcle (power stroke) forces piston down to create engine power.
Signs of turbo going out are engine power is down or engine smokin oil leaking from turbo turbine shaft seal into combustion Chamber
its between the fire wall and the engine. down about 12 inches
When your Miata bogs down with the AC on, it’s likely due to the additional load the air conditioning system places on the engine. The AC compressor draws power from the engine, which can reduce overall performance, especially if the engine is not producing enough horsepower to handle both the vehicle's normal operation and the extra load. This effect can be more pronounced in lighter vehicles like the Miata, where power output is limited. To mitigate this, ensure your engine is in good condition and properly tuned, as well as check for any issues with the AC system itself.
Could be an engine power problem or the hydraulic pump is not sensing the load and could be trying to absorb too much power.
The power stroke. The order is intake, compression, power and exaust. The piston moves down on intake and power but is only forced down on the power stroke
Aside from a complete tear-down there is not much you can do. Regular oil and filter changes can help prevent that condition.
Probably not a good idea, your power steering and power brakes will not be functioning.
On the passenger side of the engine about half way down inside the engine compartment toward the front of the engine compartment