Hello folks! All winter my 99 durango 5.9L was fine, now that its warm out, when i sit and idle or stop at a red light it shuts down, stalls and says no bus on dash, wont start up, and no gauges work, if i jigle the plugs on the pcm it will eventualy start up but does this all the time now, any help please would be more than appreciated!!

 

Disconnect PCM, clean connections, make sure PCM is very firmly reattached to cables. Test. If still NOBUS, replace PCM.

IndyDurango

 

+1 on indy, dirty connections after a rough winter of road salt and neglect could easily cause issues.

 

Ok i did clean all three plugs and as usual it runs fine untill i sit at idle for a while in the heat. It doesnt always say no bus, but each time it fails like this all of the gauges stay at zero or home positions and it just continues to crank, if i unplug the back conector and plug it back in i hear the fuel pump start to work and the gauges go back up , but it wont start. As soon as i let it sit and cool persay, it starts and runs fine. As long as i am driving or if its cold out i have no problems. The only thing i can think of is to make a alunminum heat sink with a pc fan to run and try to keep it cool

 

Put a bag of ice on it and see if the problem continues.

Sounds like heat failure on PCM. Replacement will be necessary if so.

IndyD

 

+1


If you need to replace the PCM then let me suggest Ebay as you can get a new one Pre-Flashed delivered to your door ready for direct install for $200. If you buy a regular or have a dealer install you looking at about $500.