99 freightliner problems

Yes nothing was coming out of either line when I had it disconnected as the air built up it started coming out of the little line. Still nothing out of dryer purge valve. Once I pushed that little line back on with air coming from it the dryer purged properly air psi stayed at a good level. So still a bad dryer/purge? Or run with it and see what happens

 

Sorry I should have said nothing was coming out of that little line or the purge valve when disconnected air came out of small line when pressure built

 

Not cold enough for ice here in deep south Alabama not yet at least. I was wondering if that valve was stuck I had that happen once. A bunch of water blasted out so I'm sure that filter is shot. 3 years I've had the truck I've never changed that out. And unfortunately my lack of knowledge I didn't even know there was a filter in there. Guess I learn the hard way but won't ever forget that

 

This is entirely off the subject but oddly around the same time I started this project maybe related but I'm doubtful.
Last week I parked for the night in mid Indiana it was bitterly cold so I idled from there to south bend my truck sputtered and/or popped while accelerating high and low side and smoking like crazy. When I got to my unload I shut it off to check for codes nothing new just old coolant and boost sensor (replaced beginning of January) then truck wouldn't start hitting the engine start button it clicked once! Checked for power Checked batteries nothing out of sorts. I jumped the starter protection plug and it fired up. Went to portage to load ran like crap the whole way but truck started just fine then on to a mechanic I know who ran for codes but nothing new he suggested some 911 as it's single digits out. Ran my coil down to north Alabama ran like crap the whole way same issues. I idled again that night again cold as hell. It idled like normal but hard a few times waking me up then smoothed out no odd idling or rhythm I've had bad injectors before. It ran hard again at 630 am woke me then slowly chugged to a stop!! Turned the key then it restarted without an issue and ran perfectly all the way to south Bama. That when I did this job compressor and governor obviously I still need to change my dryer but I left Thursday ran to Birmingham then talladega unload then to Tuscaloosa reload then to mid Kentucky and it ran perfectly. Idled because it was again cold as hell then it did the same thing!! Ran like crap sputtered or popping smoking I stopped it wouldn't start jumped the protection plug again ran to Huntington WV running like crap the whole way shut it off to unload it started fine then down the street to load and its been running fine to Memphis!! I know there's about 100 different things it could be but #### why would this just come and then go? I'm due for a service in about 2,000 miles probably need new air filters and just for FYI engine was rebuilt in March of 2024 new heads new Bosch injectors. Overheads were checked 15,000 miles after with first oil change. Besides the boost sensor issue that I spoke of which made it run similar but not smoke it's ran absolutely perfect!! And I also bought another boost sensor in portage after mechanic looked at it just incase I got a bad one replaced it at home before heading out Thursday. It was a little loose and I tightened it but still ran like crap the whole day. So I'm just wondering if anyone has had this problem or any ideas what this may be?!?! When it's not doing that it's just fine! Both happened after idling in very cold weather and always ran just fine afterwards. I've used diesel treatment both times.

 

I'm guessing white heavy overcast skies made it hard to really tell. Started right before I disturbed the compressor and pump then afterwards. The plug I jumped is on the new version of the starter installed last year it's a starter protection plug or sensor. I have not checked the srs or trs plugs where are they located? I also wondered about the intake air temperature sensor but wasn't sure if that would throw a code one it's own or not

 

I did locate the srs and trs plugs I ment to tell you that but they pulled me in to unload. Guess we're changing out some sensor just to rule things out probably all old if not original in my case also. Yeah just weird how it can go from absolutely terrible to just fine after restarting it a few times lol ill repost if I find a culprit to maybe help others in the same boat as well. Knock on wood she's been great since her spell Friday afternoon but parts of me thinks it's going to be even harder to nail down with it sporadic behavior. 3 plus year's with this truck and never had a issue like that until a week again both during cold weather but not before in equally cold weather so I'm dumbfounded lol