3406b issues

Trucks a 90 peterbilt 379. 3406b in it. The engine just dies. This issue seems to only happen when it's at operating temp. And only seems to happen so far when I'm coming to a stop and clutch it or at times when I rev it and let off suddenly. Never under load. I can usually save it and keep it running if I catch it in time and give it fuel but if I dont it just dies. It doesn't happen at every stop. It doesn't happen every time I let off but it happens enough to be a pain in the rear. Any help would be appreciated

 

Right around 650 according to gage

 

I'll give that a try and see how it goes. It's closer to 6 by the looks of it

 

That seems to have worked. Drove it around for 40 minutes and couldn't get it to replicate like I could before. Gonna unhook and do it again tomorrow and see if it does it but thank you for the help and quick replies

 

Took it out today for a few hours and that seemed to work. It wouldn't replicate what it was doing the other day at all no matter how hard I tried. So I believe it's good to go. Thank you for the help