back firing

[pauls painting]

tring to get another week out of her before i swap her for 6.9 ,on the way home today she started to back fire now at idle she has a back fire and hard miss ,any thoughts on what this could be? need truck to haul trailer in am

 

[Diesel JD]

I would guess either lifters or a bad injector or two. Maybe air. Did you try and loosen injectors to see which cylinder(s) the miss is on? Good luck,
J.D.

 

[87crewdually]

Start it cold and feel the individual runners on the exhaust manifold to see which cylinder is missing. Crack that cylinder's injector line with a 5/8 wrench while it's running to check for fuel.
You may have a bad or sticking valve. Try compression check to look for the cylinders to be close to each other in pressure.

 

[Freight_Train]

Back fire in a diesel is BAD!That means the Exhaust valve is open slightly or there is a chunk missing allowing the Cylinder explosion out.Diesel won't explode like gasoline will in the tail pipe.If it did,most of use would be driving Roman candles thanks to overfueling........You have a very short time left on that engine.

 

[pauls painting]

drove it today and she was a little`sluggish this am. but after about 15 minutes on highway she started running fine? in the next couple weeks hope to have 6.9 in and running...