Coil Check

MICGIVER COIL CHECK: :2cents:

1) Keep suspected Coil electrical connector connected.
2) Unplug coil from Spark Plug.
3) Connect a Spare Spark plug into Coil + tape it in with black electrical tape.
4) Using a black jumper cable,connect one end to body ground,and the other
end to the base of Spare Spark plug.
5) Start Engine:eek:
6) Does the Spark plug work?:headshake
7) Roll bad coil with a know good coil.

CAUTION - Becarful of the two wire electrical connection to coil,they can break.
:ylsuper:
MCGIVER

This will work with a totally bad coil and will verify the source of a misfire code as a spark issue rather than a fuel issue. Not sure it will work though on coils that only fail under load. Steps 3 and 4 are important. One thing you don't want to do is skip these steps and just try to spark the coil to a ground. That's a good way to make a good coil fail.

-Rod

I have cleaned contaminated coils (oil/water) with alcohol & hair dryer!

New valve cover gasket,spark plug boss seals,new Iridium plugs,and MAF.

See Forums > jaguar > s type ($3k JAGUAR)

MCGIVER