Take a look at to oxygen sensor. A dead sensor can cause your engine to surge and miss. If you live in the north were the fuel is oxygenated it happens more often. Something about O2 sensors being killed by oxygenated fuel.
Dirty fuel filter
Diesel engines do not engine brake like gasoline engines do, so relatively speaking, the rate of deceleration would seem to be slower.
A deceleration valve is a device that controls the rate at which an engine returns to idle speed after the throttle is released. It helps prevent stalling and contributes to smoother engine operation during transitions from acceleration to deceleration.
The check engine light may come on during deceleration due to various issues, such as problems with the engine management system, fuel system, or emissions controls. Common causes include a faulty oxygen sensor, issues with the catalytic converter, or vacuum leaks that affect engine performance when the throttle closes. Additionally, changes in engine load during deceleration can expose existing problems that trigger the light. It's advisable to have the vehicle diagnosed with an OBD-II scanner to pinpoint the exact issue.
Just going on the information you've provided in the question, it's doubtful that the engine light is the cause of the deceleration. It's more likely that the light is correctly indicating the presence of whatever malfunction in the engine is causing the deceleration, and the engine malfunction is what you need to identify. Your local friendly mechanic is your best choice.
the computer tells it to glow.
Just going on the information you've provided in the question, it's doubtful that the engine light is the cause of the deceleration. It's more likely that the light is correctly indicating the presence of whatever malfunction in the engine is causing the deceleration, and the engine malfunction is what you need to identify. Your local Mazda dealer or friendly mechanic are the best choices.
The engine temperature can influence the deceleration shut-off speed by affecting the engine's efficiency and fuel mixture. When the engine is cold, it may require a richer fuel mixture to operate smoothly, which could lead to a higher deceleration shut-off speed. Conversely, a well-warmed engine operates more efficiently, allowing for a smoother transition to lower speeds. Additionally, excessive engine temperatures can lead to performance issues, potentially impacting the deceleration characteristics.
Engine vibration can be an indication of a misfire, but more often it's just the AC compressor causing a little shaking.
A few suggestions, first I would not drive this car until I have had it checked out. losing power can cause hard steering and braking loss. Some of the causes could be a dirty fuel filter and or fuel injectors, some other intermittent causes could be a loose connection on the battery or elsewhere.
check your engine mounts..I am not sure where they are but if you can move the engine with a prybar you need new mounts..they arent to expensive
engine diagram for a 1993 saturn