Many possibilities. Fuel flow problem (fuel pump, clogged line, fuel injectors) Contaminated fuel. No spark or weak spark (bad plug, wires, electronic ignition module) No air flow (Clogged intake, clogged filter) Bad timing belt/chain (I can't remember which one a '93 has).
A bad cam or crank sensor can cause a no start, but the engine will still crank or turn over.
There are several reasons that will cause an engine to crank over but not start. The most common cause is a lack of fuel.
crank sensor is bad
You'll need to lift the car and reach over the starter,the crank sensor is mounted on the block. you won't be able to see it but you will feel the connector.
Have you checked for fuel and spark? Camshaft sensor and or crank sensor will cause that problem as well!
If you changed the battery on a Saturn S-Series 201 and the car will crank over, but won't start, the security system needs reset. Do this by inserting the key and turning it halfway. Leave it this way for 10 minutes before trying to start the car.
The most common problems that could cause this are corroded battery terminals, the battery being weak, or an alternator going bad. Luckily none of these are generally too expensive to fix.
Bad crank position sensor
It is the ECC relay! It is the ECC relay!
A bad crank sensor could do that. (if it has one)
this can be cause by the crank position sensor if the fuel pump is running well then the only thing that cold cause the problem is crank position sensor
my 1998 kia sephia will not crank over