1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
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23,867 Posts
Welcome to Allpar. Which engine? Any fault codes?
http://www.allpar.com/fix/codes.html
The ASD relay will shut off power (+) to the coil pack and injectors after a moment if it does not detect engine revolutions. Is there spark while cranking? Is there fuel pressure at the rails?
The cam and crank sensors have nothing to do with (+) power getting to the coil or injectors. They just signal the PCM to fire the ground side of the coils and injectors. There should be 12 volts (+) at the coil and injectors when the key is first turned on for a moment, during cranking and after the engine is running. Have a helper work the key while you check for voltage.
More info: http://www.allpar.com/fix/stall.html
You may want a service manual if you need to trace wires.
The relay itself is rarely the problem, but you can swap it out with another similar relay in the underhood PDC (fuse/relay box).
http://www.allpar.com/fix/codes.html
The ASD relay will shut off power (+) to the coil pack and injectors after a moment if it does not detect engine revolutions. Is there spark while cranking? Is there fuel pressure at the rails?
The cam and crank sensors have nothing to do with (+) power getting to the coil or injectors. They just signal the PCM to fire the ground side of the coils and injectors. There should be 12 volts (+) at the coil and injectors when the key is first turned on for a moment, during cranking and after the engine is running. Have a helper work the key while you check for voltage.
More info: http://www.allpar.com/fix/stall.html
You may want a service manual if you need to trace wires.
The relay itself is rarely the problem, but you can swap it out with another similar relay in the underhood PDC (fuse/relay box).