Hi everyone. Newb here. I purchased a 2000 5.9L with 130K miles in November of 2018. It ran great until October of last year. It began stalling while driving. Sometimes it would crank back up after a few tries, but I usually have to wait 15 to 30 minutes for it to crank back up. I initially get a No Bus indication on the odometer when this happens. This leads me to believe it's a PCM issue. I did a little research on it and it may also be the crank sensor. It used to happen infrequently but happens all the time now that it has gotten hot. With the heat ramping up and seemingly exasperating the issue, would this point more to the PCM overheating? The PCM looks to have been replaced in 2010 is that info is of any help. Thanks.

 

Yeah, something is getting hot, and failing. The 'no bus' message when it happens kinda points to the PCM, but, there are a fair few things that can also cause that..... a failing sensor being just one of them.

When it won't start, does the fuel pump prime when you turn the key on? Does the pump run while cranking? (might need a second set of ears to check that one......)

Welcome to DF!

 

Also a bad connection to the pcm will cause a no bus. Are there any codes after you can start it?

 

HeyYou - Thank you I'll have my son help me with checking the fuel pump. I do know there is fuel pressure when it doesn't start. I'm not sure if that's necessarily an indication that the fuel pump is good though. Any suggestions on how to determine whether it's the PCM or a sensor without replacing parts first?

 

Moparite - I don't have the device to check the codes. But the check engine light does not come on any time during this process.

Not sure if this has anything to do with the stalling issue but my radio loses power intermittently as well. This started shortly before the stalling started.

Thanks

 

Figure out what's missing when it won't start. Spark, fuel, or both.....

 

If you haven't already figured it out, I went through the same thing. To troubleshoot the PCM, while the truck is running go to the PCM and wiggle the connectors around pretty good and if it stalls out that's most likely your culprit.