1990 Dodge D350 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Dodge D350

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1990 Dodge D350 Problems

Air Conditioning Not Cold

The powertrain control module (PCM) may fail resulting in a lack of AC cooling. The lack of cooling could be caused by evaporator freeze-up due to the AC compressor staying on continuously or conversely, not coming on at all. Proper diagnoses of the PCM should be performed before replacing it for this concern.

Fuel leak from injector

Engines using a throttle body fuel injection system may develop a fuel leak from the fuel injector nozzle or the injector o-ring seal can cause any of the following: Hard starting, rough idle, black exhaust smoke, and poor fuel mileage.

Diesel engine hard starting issues

Diesel engines may develop a hard start or no start condition due to any one of  the following issues: Low fuel pressure, air entering the fuel system, and loss of fuel system prime. Our technicians tell us that the rubber inlet hose at the back of the injection pump and the lift pump are common causes for these concerns. Lack of fuel to the injection pump can damage the pump due to lack of lubrication, when this occurs it is not uncommon to replace the lift pump, injection pump, and fuel injectors.

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1990 Dodge D350 Questions

What will cause truck not to start? (1 answer)

I have replaced fuel filter, battery, starter, distributor cap and points, no fire going to coil, what else could it be?

Any suggestions on creating a simple charging system from alt output to battery? (2 answers)

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 ...

90 Dodge 350 15 pass van not charging, alt checks good.. volt reg? where? or? (1 answer)

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. A...

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