1990 Dodge D150 Problems

RepairPal has identified the most common problems with the 1990 Dodge D150 as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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14
Known Problems

The engine may develop a rattling or lifter type noise from the timing cover area. It may also exhibit a more general valve train noise. Our technicians tell us that a revised timing chain, sprockets, and tensioner are available which may correct this concern.

The engine may develop a lack of power or stalling condition due to low fuel pressure. Our technicians tell us that this can be due to contaminates passing through the fuel pick-up screen resulting in fuel pump failure. If fuel pump failure occurs it is recommend to replace the entire fuel pump module as it includes both the primary and secondary fuel pump filters.

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.

An intermittent fault with the electrical connection at the crankshaft position sensor may result in poor engine performance and/or a no start condition.

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.

The fuse may blow repeatedly for the HVAC blower motor or the motor may stop working all together. Our technicians tell us that can often be repaired by replacing the blower motor switch with a revised switch and installing a wiring harness with a relay assembly.

The blower motor may operate erratically and the blower switch operation has a sticky or mushy feeling, the detents almost non existent. Our technicians tell us that the blower switch should be removed and inspected for overheating. This is common if the blower motor is frequently operated on high speed as the current flow through the switch tends to melt internal the components. Also carefully inspect all of the switch connector terminals for discoloration due to overheating and replace as required. A poor electrical contact at the connector will also cause the switch to overheat.

The AC/heater (HVAC) system may unexpectedly switch to the defrost mode when accelerating. This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops.  There is also a revised vacuum check valve available to address this concern.

Pinched or restricted transmission oil cooler lines can cause transmission failure due to lack of lubrication. Our technicians recommend complete inspection of the transmission cooler and lines if this type of failure is noted.

Carbon buildup on the top of the piston is common. Over time this can lead to symptoms varying from light ticking to knocking noises. Performing a fuel injector cleaning procedure can often help the condition by removing some of the piston top deposits.

Oil leaks from the valve cover gaskets, timing cover gasket, distributor o-ring, and rear main seal area are common. The leak at the rear main seal area is generally not the seal itself but the bearing cap to the engine block seal. An oil leak could also be internal to the distributor, if oil is found inside the distributor then the distributor should be replaced.

Vehicles equipped with 12" diameter rear brakes may encounter premature rear brake shoe wear. If it is found that the brake system is functioning as designed the repair would be to replace the affected brake shoes with revised parts.

A delayed transmission upshift may be noted in cold weather (32 degrees F and below). Our technicians tell us that cast iron sealing rings for the hydraulic governor are available to replace the original teflon rings to address this concern.

Cracking or popping sounds from the cowl area may be a result of cowl cracks at the lower corners of the windshield. The fenders must be removed to see the cracks. If cracks are found, a reinforcement kit is available to correct the condition.