Engine will turn over but not start

If you smell gasoline when tying to start the engine then it's not your fuel pump. It's more than likely an electrical component stopping it from sending spark to the plugs, rent or buy a code reader, pug it into your car and get t codes, these codes will give you a real good idea of were to start looking for the problem.

does the engine turn over but not fire? it may not be fuel to check remove one of the spark plugs and while you turn engine over get someone to look out for signs of fuel emmitting from open cylinder if there is a smell/puff of fuel check that you've got a sperk at plugs as a starting point if not get the OBD read

smelling gas like you are is a bad thing, engine must turn over to fire injector. sounds like flooding ( possible ECM/power computer bad ). Before condemning the computer pull all spark plugs, disable ignition coils, then try cranking to see if engine will turn over. Be carful if hydro locked gas will be pushed out the spark plug hole/s

well if u got spark all u need now is fuel! when you turn key do u hear fuel pump working for the 3 seconds? do u smell fuel at engine intake?

I'd have to test when problem is ongoing. When you first turn on key, no crank, you should hear the pump run for a few seconds then stop. For initial prime, the computer doesn't need rpm signal. Engine cranking, the computer needs to see rpm signal or it won't ground the fuel pump relay. W/o rpm signal, no spark at the plugs and no fuel injector pulse. I know your talking about fuel, but, when problem is ongoing, check spark and fuel injector pulse, engine cranking.
Intermittent problems are a pain, have to test when problem is ongoing.

engines need 3 things to start (petrol engine)
fuel, air and a spark,
as you have been working on your fuel system it is best to suspect this system first,
on engine turn over see if you can smell fuel at the exhaust.
if you smell fuel the fuel regulation mybe too high and the engine is flooding.
if you do not smell fuel, remove fuel line from engine and ensure fuel is getting to the engine,
(be careful not to let fuel spill this generates a fire risk)..
once fuel is getting to the engine, check your ignition system to ensure you have a good spark to ignite the fuel.
finally check your air filter is not blocked and that you have air getting to the engine.

I hope this was helpful.

the engine is either not getting fuel, or is not getting spark. with the ignition key in the "run" position, listen under the rear of the car (near the fuel tank) for the sound of the fuel pump. or, after cranking on the starter for a while, remove a spark plug and smell it. smells like gas? if so, the problem lies in the electrical area. if not, fuel is not getting to the engine.

1. use scanner to find out if there's trouble code.

2.. it's not clear if the starter (motor) turns as you try to start the engine, if not, check starter motor including intermittent (maybe) problem with the ignition switch.

3.if starter motor turns everytime you try to start: check the electrical ignition system: coils & spark plugs

check your crankshaft position sensor

This may be a result of no fuel or no spark. To test, remove a spark plug after turning the engine over for a few turns and smell it. If it smells like gas, it's a spark problem, if not you should check your fuel lines for leaks or your fuel pump. A quick way to test the fuel pump is to put the key in the ignition, turn it to "on" but don't try to start the car and listen for the pump to "prime" the system. It will sound like a low humm.

To check for spark, remove a plug and hold it against the engine block while someone tries to start the car (only turn the engine over once or twice while doing this!). If you are getting spark, you should see it. If you aren't, check the firing order, the distributor cap/coil packs, wires, and the plugs themselves.

I hope that helps and good luck!