dead cylinder

[irl3r]

I’ve got a JD 790 with a 3tne82a engine with only 539 hours that has a cylinder not working. the tractor started running poorly. so after checking for obvious issues i tried cracking the injector lines one at a time . on cylinder 3 it made no difference in the way the engine ran. i swapped injectors and the problem did not follow the injector . my next step is a compression test. has anyone experienced this issue.

 

[TractorTech]

Stuck valve?

 

[beenthere]

irl3r
Welcome to TBN

When you cracked the lines, did you get fuel at each one?

Do you have the service tech manual?

 

[irl3r]

yes , loosening cylinders 1and2 fuel feed lines the engine nearly cuts off

 

[irl3r]

yes i have manual .
175 psi in #3 cylinder cranking engine over

 

[irl3r]

Stuck valve?

175psi in the cylinder

 

[oldnslo]

175 PSI seems low for a diesel, did you check the other cylinders for a comparison?