I replaced a fuel pump, fuel filter within the last week. The pressure is where it should be on the injector rail. But I am experiencing a hard grinding while it is trying to start. Any suggestions. PS. I also checked the fuel regulator and that is okay. HELP !
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Check or replace fuel filter again. You could have had a lot of sediment in your tank. If it ran good for a week, that's where you need to start figuring out what was replaced during that time. If you can, check fuel pressure at schraeder valve on fuel rail.
It's possible the fuel pressure regulator is not operating properly, or the fuel pump relay is an issue. Slim possibility the fuel pump
wiring you did is a little off. I don't see that you replaced the fuel filter or filters, could be blocking fuel flow to or from fuel pump.
have you checked to see if engine is firing? ignition module can go bad and you would loose fire and fuel at the same time. i replaced one on a chevy truck last week and it was located beside the ignition coil.
If you have tried starting fluid to verify there is no spark (use sparingly), a likely culprit is the crank sensor. The ignition module could also be at fault. If there is zero pressure at the fuel rail, the pump has failed. If pressure is low, the pump may be failing or the filter may be clogged. Check fuses and relays before investing in a new pump, sensor, or ignition module. If you have to guess and check, replace the fuel filter first, as it should be replaced periodically anyway, esp. if you end up replacing the fuel pump. It is also possible that a wiring harness has corroded or been broken if there is really no fuel at all and no spark at all.
the fuel rail is on top of the engine. look for the injectors the rail is the metal fuel line that supplys fuel to all the injectors. you can also find a fitting on this rail that a pressure gauge can be screwed onto. it should have a black cap on it. kinda looks like a valve stem like for the tires. but you may have a faulty pressure regulator. a clogged fuel filter or a bad fuel pump. replace pump last. it will be more expensive.
it will not blow when ECM is disconnected, cause there is no power to the injectors when you disconnect the ECM. When you turn ignition on check for fuel pressure at fuel rail. Release pressure at nipple on fuel rail. If no pressure exists puel pump is shot. If there is pressure your fuel filter might be plugged.
If the hard grinding noise is a metallic sound only when you start it, sounds like your starter bolts are loose or the starter itself needs replacing. fuel pressure doesnt cause any particular noises like that. If your fuel pressure or pump had problems, your vehicle simply wouldnt start