visible fuel at exaust man

[miko]

92 ranger with excessive fuel on lh. side of eng.; cyl's are colder than rh. and runs same with all 4,5&6 plugs disconnected.did resistance check on coil & checked plugs for spark and had bright blue spark on all three. truck not used much the last couple months; stickey injector? any help appreciated.

 

[monsterchuck]

Did you actually pull the plugs out and look at them? Or did you just put a spark tester on it? I doubt all three injectors are sticking at the same time, so I'd start looking for a spark plug issue being that you ruled out the coil.

 

[shane96ranger]

Do you have a check engine light on?

What exactly does "visible fuel at exaust man" mean? You pulled the manifold off?

I almost wonder if you've got a blown head gasket.

 

[miko]

Removed spark plugs and plugged wires onto new plugs. Bright blue sparks were noted at all plugs when engine is turned over and plugs dangling grounded to eng. Dont think its an ignition problem.

 

[miko]

exhaust donut at manifold to pipe flange is bad and leaking, able to see un-burned gas coming out of exhaust leak at man.

 

[shane96ranger]

Are you sure it's not condensation?

 

[miko]

Positive. Spark plugs 4,5 & 6 are soaked with gas.

 

[monsterchuck]

The more I think about it, the more I think it could be the coil. I've seen them pass a resistance test and even make plugs fire when they are just hanging there on the side of the engine, but when installed the pressure inside a cylinder makes it harder for the spark plug to spark, and the coil is too weak to do it. Only surefire way to test it is to put a known good coil on it. That's why I have a whole pile of used test coils in my toolbox at work.