I'm getting no spark to the motor on a 1998 ford taurus, Have checked the coil and plugs?
I'm getting no spark to the motor on a 1998 ford taurus, Have checked the coil and plugs? - 1
When you turn on the key to the run position you should get 12 volts to each coil. The first thing to answer is are you getting voltage or not. If not start at the fuse box and TEST the fuses with a TEST LIGHT. If your getting the voltage to the coils then it may be the cam positions sensor.
Listen for the injectors to click (injector pulse) while cranking the motor over. If you don't hear them clicking you likely need a crankshaft sensor.
There's a 20 amp fuse… Location 10 in left side fuse box of dash area under instrument panel… That powers the ignition coils… Check if that one is blown.
If the fuse is good, then check the white/light blue tracer wire at the coils to see if it's getting power with ignition on… If not, then check for bad white /blue wiring between fuse box and coils. The ignition coils are fired/grounded by the PCM/computer as needed which needs to see an rpm signal from the crank sensor to know the engine is turning over… Common for the sensor to fail/go bad as well or other circuit issues possibly.
The same white/light blue wire circuit from fuse 10 also powers the PCM relay when key is turned on which in turn powers the fuel pump relay and other PCM circuits so make sure the PCM relay is working… Should make a clicking noise when ignition is turned on… Test relay and circuits if needed.
Wiring diagrams…
http://arrc.ebscohost.com/searches?car_uuid=1304581&fa_uuid=uuid_p5_wiring_diagram_208098176019896115280729879317934830477&filters%5Bservice_information_type_path_facet%5D=root%2Fmrt%2Fsit%2Fp5_diagrams&filters%5Bsystems_component_path_facet%5D=root%2Fmrt%2Fssc%2Fp5_engine_controls%2Fengine_controls_1_of_3
If the car has a tachometer, watch the tach needle as you crank the engine. If the tach needle does not move, check the crankshaft position sensor. If it is moving, check if the coil is getting feed (constant) and signal (switching) voltage.
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