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All electrical works lights etc.,car turns over but wont stay runnun. will rev to 3000 idle back down and then die.wont idle right or stay running.replaced coils,plugs,wires,gaskets,oil and filters and battery.
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Have you checked the fuel pump for any blockage? The car isnt getting any gas unless u manually pump it by pressing the pedal.. So start there Sometimes when a engine requires excessive revving and throttle to stay afloat its a fuel supply problem. A clogged filter for example can be overcome with excessive throttle that drives the fuel pressure up enough to force it through, but it will barely trickle at idle and stall.
Usually the dead give away for fuel pump is when someone complains they have to floor it as soon as it turns over or it will die right away.
More likely the battery, try starting the car with no electrics running (interior light, fans, wipers etc.) when it fires rev it up a few times and let it idle for a bit before pulling away if it runs fine after this you can use you electrics as normal . if its an auto pull away slowly if its a manual pull away with more revs than normal but very slowly engage the clutch.
try checkin your idle air control. most of the time it is a vacuumn line going into intake.pull it off and if the car revs up dont worry, it wont hurt it. if it does simply put it back on, if it dies you have a bad vacumn.
Change all the filters (fuel and air). check and see if all your spark plugs are firing or just change them. if it is fuel injected make sure your injectors are working. Hope something there helps get it running good.
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