Turns over like it wants to start but wont kick over! what should i do

Check fuel filter, seems it's not getting fuel.

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my nissan quest 2004 has no voltage in the gas pump electric connector and the ignition coil the engine turn over but wont start

get your battery checked

when you say wont start do you mean that doesnt kick or turns without any engine run.

Did it work fine before the service? What hose was replaced?

do you have spark? may be the timing. if it turns and turns and wont start, take off a plug wire.(wear heavy gloves) hold it close to the plug and have someone turn the motor. If it sparks, not the timing, if it not, timing belt is gone

Well its cranking so not the starter and its got the juice so not the battery maybe. Check to see if its got the correct voltage to kick it over. Could be a fuel problem replace plugs wires and fuel filter. Also check you oil level maybe its low and wont start bc its low. I think it has a oil level sensor that may prevent it from turning over.

Check to see if the fuel pump is kicking in,
when you turn the key on without starting the van you should hear it kick on for about 2 seconds,

It could be...
A clogged fuel filter...
Blown fuse for the pump..or bad pump relay..
No gas
Bad fuel pump

Fuel cut off switch or inertia swith on passenger side kicker panel, it might have got accidently kicked while getting out.