engine not sparking ive tried everthing

[Al.Fisherman]

You can have a GOOD electrical system, and have the plug fire uninstalled AND not fire when installed...have you done a compression test yet?

 

[motorpsycho]

You can have a GOOD electrical system, and have the plug fire uninstalled AND not fire when installed...have you done a compression test yet?

I disagree with you. A spark plug will either fire or it won't fire. It doesn't know if it's installed or not.

 

[Stan4d]

I disagree with you. A spark plug will either fire or it won't fire. It doesn't know if it's installed or not.

You are both right. It can fire when not installed. But if everything else is correct and it does not run installed, most people say it is not firing. However it is likely that it is firing the same as when out of the motor....it is just not a strong enough spark. It is always a good thing to try another plug first.....when you are down to repairing by replacement, go with the wearable and cheep parts first.