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Dodge D350 Questions

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Now the truck pops and knocks while im driving then stalls. It started out doing this after it got worm now it wont even make it down the street. Also it used to be able to be started after 5 min. Not once it stalls it wont start till pretty much the next day
It used to stall only once n a while but now it's all the time and lately even when I let off the gas it will try to stall. Sometimes I can give it gas and catch it befor it dies. But it getting to be more challenging to keep it from stalling.
Tried to crank it nothing had to run a jumper wire from fuel pump to hot side of battery then starts but only way to turn off is undo wireany help out there???
I have replaced fuel filter, battery, starter, distributor cap and points, no fire going to coil, what else could it be?
The voltmeter when up to 18 volts and blow up my Altima battery I replace the voltage regulator but it's still not going down.
i have a problem i have to pump my breaks to make them work
Where is it located? I cannot find it in the engine compartment and the only place left concealed is the dashboard and firewall behind it. Also have to ask, even though I was sold a freestanding VR, where is the "black box", computer, auto switching box or whatever you wish to call it. I have seen reports that this VR is a part of that and that there are more than one type of electrical system on vans of this year. The Alternator box said it was for external regulator and new alternator did not help with problem of NOT CHARGING. The VR I have is a 1" thick 4x5" metal can with one two wire connector and filled with black epoxy on the back side.
This 90 350 van may be going to scrap before I replace the ECM due to the previous experience with the diesel truck ECM, Dodge dealer and Chrysler in general. If so I will be looking for an older vehicle with no computer, most likely a simple carb and ignition system that I can fix. I have had a lot better luck with Ford and Chevy vehicles as above and would not EVEN consider a new vehicle today because the most simple design is almost always the most reliable in my 64 yr experience. Wish I could find a diesel van but have never heard of one so? Maybe a Caddie or Lincoln W/trailer(s) as these have served me well before. Maybe I'll search out a VW microbus as that is one of the most simple, practical, economical and dependable designs I have ever seen. Just hate to give up the size and comfort of the big dodge but am really tired of Dodge trucks that are the real Fix or Repair Daily vehicles from my experience. Any suggestions?
suspicious 2x3" metal "can" on firewall front connects to batt..but no voltage on any of the other 3 wires? Saw post about engine control circuit inside firewall? in engine comp't? under dash? inculding regulator? what does it look like? Dies when either batt cable pulled. Any other parts in charging system? Heard that cables loose to dash voltmeter could be the problem? This is my home electric generator w/big deep cycle batt & inverters. Any other quick diagnostic tests? 12V to ground on all 3 alt terminals OK. Connectors cleaned/replaced. Multipin plug in wiring on front of firewall kills engine when unplugged.
Its a 91 d350 all new charging system parts. Ive rewired the regulator and alternator. 12v signal from coil to regulator and then to one of the fields then regulator to the other field. Ive got it wired right so idk whats next....
is it something that can easily be done at home
new fuel pump/screen/filter.will only run for a miniute if u dump some fuel down tbi.fuel pump relay? IM FUC**NG LOST!!!!
How many quarts does the transmission hold
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