Wont start\good fuel pressure\good spark

Did you check for spark at any ot the spark plug wires/ coils? If there is, check for fuel pressure at the fuel rail. Take the port cap off and connect a fuel pressure gauge. If one is not available, with a pocket screw driver deppress valve at port and observe if fuel pours out. If no fuel comes out at all, check your fuel pump circuit. Check for good ground and power at fuel pump connector. If power/ground are ok, replace fuel pump. If spark and good fuel pressure is present, there is the possibility of engine mechanical issues(jumped) timing chain). Also, a plugged catalitic wont let engine start but its very unlikely thats your problem. Start with your basics: spark, fuel, engine mechanical and catalitic.

Its either no spark or no gas. Remove the fuel line and carefully crank it over..are you getting any fuel? If not possibly clogged fuel filter or bad fuel pump. If yes, are the spark plugs firing. Remove number one plug lead hold close to any metal surface on engine, crank over ..spark there..strong or weak spark? No spark check coil and associated parts.

which engine?
post the symptoms, please.
my guess, it wont start?
or stalls?
and spark is 100% good (tests)
and now you suspect fueling system loss?
fuel is last check.
after good engine, good spark and if good , try test fuel (spray)
if motor starts for 3second test fuel, then you have lost fueling
we then do the fuel pressure checks in the FSM , every step, (6)
we check pressure cranking, many engines must crank to get fuel..

You only need three things to start an engine.
1) Clean Fuel / Air
2) Compression
3) Spark

One of these is not working correctly. The fuel pressure is good, but the fuel line, fuel filter, injectors, or carb may be dirty or clogged. If the gas has been sitting for a long time, or could have water in it, there is potential for the gas to be gummed up, and it wont ignite. Start with clean, new gas, line, filter, and if it still wont start, move on to the #2, #3 items from the list above.
Move through the troubleshooting systematically.
Remember, you only need 3 things to get it to run!

Good luck

If you have spark, and the timing is good, you are either not getting enough fuel or there is not enough compression. If you checked the spark from the spark plug wires and got a spark, try changing the spark plugs. The spark from the plugs may be too weak to ignite the fuel.

Have you changed your fuel filter? This is a very common cause of a no start condition. Have your fuel pressure tested to ensure you are getting the correct amount of fuel. Also, you could try replacing your Fuel Pressure Regulator.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

year and model and engine size if applicable

if no fuel pressure or spark its probaly the "Main Relay" this is located under the steering column. hope this helps.

ok make sure you have good fuel pressure
you must have good spark must fire a spark tester
if all that is good then check compression
and don't use STARTER FLUID on a GAS ENGINE it can blow a hole through the piston
hope this helps

If you have spark, then the next thing to look for would be fuel to fuel rail and good pressure, if low pressure, change fuel filter, check for faulty fuel pressure regulator and check fuel pump relay. If you are getting good fuel pressure, the next thing to look for is a faulty sensor

timing gear