how to tell ??

[goatwrangler]

how can i tell if my noise/chug/miss is a stuck valve ? my truck idles rough but smoothes out when RPMs raise. the only problem i have with it is when im idleing. i need to crack the lines at my injectors to see if i have an injector problem but is there an easy way to tell if one of my valves are stuck ? would a compression check reveal this ?

thanks for the help

 

[BigDiesel]

You unplug your injection pump to disable the engine from starting, and then you get someone to crank the engine while you listen at the exh pipe for a chuff. Good luck.