Engine shaking during a cold startup in a 1993 Geo Prizm 1.6L can be caused by several factors, including worn engine mounts, ignition system issues, or fuel delivery problems. Cold temperatures can exacerbate these issues, causing irregular combustion or misfiring. Additionally, a dirty or malfunctioning idle air control valve might prevent the engine from maintaining a stable idle when cold. It's advisable to check for any diagnostic trouble codes and inspect the ignition components, fuel system, and engine mounts for signs of wear or malfunction.
Timing needs adjustment is the most likely cause.
A bad valve or plug.
go see a mechanic
Does it quit shaking when it warms up? What engine and year of Aerostar?
If the problem disappears when the shifter in placed in neutral it could be a transmission or engine mounts
A frail fuel line can cause a diesel engine not to start.
Yes, just about any sensor on the engine could cause a no start.Yes, just about any sensor on the engine could cause a no start.
Have who ever did the work on the vehicle recently check it over. They may have acidentally disconnected something to cause your problems.
The Corolla could be shaking for many reasons. Start by checking the wheel bearings and brakes for wear. Then check the engine to see if it running rough, causing the shake.
As I remember ^^ Because once you start the engine you give it power so it start working, and this power is really so HIGH that your car can start from 0 MPH to 100 MPH or something like this. So for sure it would shake.
Yes
a bad engine