I have a '95 Neon (4 cyl). Gas in the tank and full power for starting - Cranks nicely but does not fire. Changed the Spark plugs (wires) and the coil/distributor unit. Same result - cranks only but does not fire. Wondering if fuel injectors have water in them in this cold weather season - lots of condensation and freezing in this climate - used to live in more dry/arid climate and never had that problem. Is there a filter and or maintenace suggestion regarding fuel lines? Or is there a more basic issue here - reasonably certain that all electrical components are fully functioning. Also, wondering where I can see a diagram for finding the fuel filter.

Ideas?

Thanks!

 

If you live near a large city you probably have upt ot 10% alcohol in the gas already. And heet which is used to dry out a fuel system is nothing more than Alcohol. So end result not ilkely. May be a fuel delivery problem such as a bad regulator or injector leaking down and leaving low fuel pressure which you are now trying to overcome. Also the Fuel filter as you thought is also a prime suspect. When you get in the car hopefully somewhere quiet, open the gas cap and turn the car to run, not start and see if you can hear the fuel pump run for a short time. Simple check to see if the fuel pump is at least trying to pump.

You can check you injectors for continuity (resistance) and also your wireing harness for power. Power test is actually quite easy as you find the side of the injector harness that has power when you turn the key on engine not running (ie dont start) and the use a test light to see if your wiring can hold a load. Check first that 12 volts is available. This second check is necessary in that if your circuit is open you will have 12 Volts even if a lot of corrosion resistance is in a power wire but when loaded the high resistance of the wire will act a load then you would only have maybe 3 Volts to power the injectors. If this is the case you would not have firing injectors. So double check fuel side as ignition seems not to be the problem (I am assuming you did check for spark at least eventually).

 

Thanks - seems that however you diagnose it -- the fuel system is the prime suspect (no pun) whether lines, filters or injectors.