2002 f250 COP Question

[cobrarwanab]

What is the procedure for checking the individual coil over plug coils using a volt meter. Changing plugs tomorrow and want to test coils while removed.

[SuperStang90]

If it aint broke dont fix it

[Sean]

is it missfiring ? Usually the coils fial from being cracked along the electrode tower where the plug boot latchs on.

[SuperStang90]

A good way to test (as long as you have a dead misfire) is by either unplugging the coil or injector while you have someone brake torqueing the vehicle (makes misfire more noticeable) and when a certain cylinder isnt affected obviously that would be the one misfiring.

If there isnt a misfire then there is no reason to check. Another thing I have found is condensation in the plug boot. Pull the boot off when the coil is out ( be careful not to damage the spring) and see if there is moisture inside on the spring/boot. I have seen that cause a misfire before, and you can get replacement boots.

[cobrarwanab]

Will check towers nd check for moisture. The truck ha 150,000 miles and owner states there is a misfire. What is the average life expectancy on cop's?

[Sean]

I have seen cops go 250k. If they aren;t maintained and see alot of internal moisture that can cuase the cracking issue. If it needs plugs and coils. Deffer to a proffessional family with the engine. It is easy to have a popomatic that will throw spark plugs outta the heads for fun.