Question about 1999 Ford Taurus

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99 FORD TAURUS DOHC - WON'T START. CRANKS, BUT WON'T TURN OVER. HAS FUEL, PRESSURE, SPARK, POWER - ANY IDEAS?

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  • timnbetz Jul 19, 2009

    IT STARTED AND RAN FINE FOR A MONTH OR SO THEN ONE DAY DID THIS. THEN AFTER SITTING FOR A COUPLE OF MONTHS - IT STARTED AND RAN FINE FOR ABOUT 3 DAYS THEN WOULDN'T START AGAIN. SENSORS WERE CHECKED WITH SNAPON LOTUS AND ALL TESTED FINE.

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If it has fuel pressure and fuel to the regulator and the rails, the regulator is working, it is getting spark to every cylinder and the timing is correct, You have good compression, it is likely a faulty sensor. You can test each one with a sensor tester or ohmmeter/multi-tester

Relay or sensor.

Posted on Jul 19, 2009

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Check the timing belt.

Posted on Jul 19, 2009

  • Anonymous Jul 03, 2015

    timing chain, no belt

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We will have to pinpoint what the engine is missing.
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All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the car to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should! Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition. Be extremely careful when doing these tests.

Thereis a relay in the Power Distribution Box, that governs the fuel pump (click image for zoom)...

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Test it and keep us updated.

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Sounds like a fuel problem. check fuel pressure and then check for power going to the pump.Verry likley needs a new fuel pump.

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