Testing Coils??

[Marauderjack]

Anyone know how to test the spark coils on our engines???

I heard that it is hard to determine which one may/may not be breaking down??!! Do you just replace them all if one is suspected bad or intermittantly bad?? :confused:

Marauderjack :cool:

[SergntMac]

Maybe something like this?

http://store.autotoolexpress.com/wae76560.html

[Rider90]

Anyone know how to test the spark coils on our engines???

I heard that it is hard to determine which one may/may not be breaking down??!! Do you just replace them all if one is suspected bad or intermittantly bad?? :confused:

Marauderjack :cool:
I know with my past 99 SOHC 4.6L C.O.P. design I could just unplug the coil and if the misfire got worse, the coil was good, if it stayed the same, I found the culprit. Can you do that with this engine?

[SergntMac]

Maybe try this?

http://www.msdignition.com/tool_3.htm

[Marauderjack]

What if the miss is intermittant and predominantly at low speeds and light loads?? :mad2:

Marauderjack :(

[wchain]

A scantool should tell you if there is a misfire, either active or stored, if the misfire is bad enough.

On another note, sometimes COPs get pinholes in the silicone boots and ground out, may wanna have a gander at those plug boots.

Good luck

[Marauderjack]

OK Wes....

What's a "scan tool" and how do I get one!!??

Boots look fine...I guess??

Marauderjack :o

BTW.....What symptoms would you expect with an intermittant??

[Dennis Reinhart]

Anyone know how to test the spark coils on our engines???

I heard that it is hard to determine which one may/may not be breaking down??!! Do you just replace them all if one is suspected bad or intermittantly bad?? :confused:

Marauderjack :cool:
Normally its a bad boot or a cracked plug check all the plugs for a carbon mark or crack, the boots can be bought seperate and WDS can check for a individual weak or missfiring cylinder