On the 3.9L V6 and 5.2L V8, rerouting the ignition coil wire and spark plug wires can help solve a misfire and/or surge problem that occurs at approximately 45 mph. A service bulletin was published that outlines the specifics of the repair. It states the rerouting procedure should be performed before other repairs are done for misfires, surging or spark knock.
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Newest reported 1992 Dodge Ram Van B250 problems
Worn or Mis-Indexed Distributor Shaft Can Cause Surging/Bucking on Acceleration
A surging or bucking during acceleration can be caused if the distributor is moved or mis-indexed. This is a result of the cam and crank position sensors being out of synchronization. Wear of the oil pump drive gear can cause similar symptoms because it allows excessive free play in the distributor drive. The distributor drive gear and bushing should be replaced if the rotor tip moves back-and-forth more than 3/16th of an inch when checking drive gear free play.
3 Reports
HVAC Air Flow Switching to Defrost When Accelerating
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.
9 Reports
Erratic Blower Motor Operation Due to Overheated Switch
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.
5 Reports
Door Glass May Separate From Lift Channel
The door glass may separate from the glass lift channel. Our technicians tell us a front door glass channel kit is available to repair the door glass. The repair involves removing the door glass from the vehicle.
3 Reports
Excess valve train noise may be caused by timing chain issues
This engine may exhibit tappet-like noise(s) and/or excessive general valvetrain noise. The tappet-like noise may move from one tappet location to another. Our technicians tell us that the repair involves the replacement of the link type timing chain and sprockets with a double roller type timing chain and sprockets.
2 Reports
Checking timing chain noise with a stethoscope
There have been reports of timing chain noise. A stethoscope can be used to help pin point the noise location. If the noise is found coming from the timing chain case, replace the timing chain and sprockets and installing a timing chain tensioner.
2 Reports
Engine oil leaks at distributor may be misdiagnosed
On the 3.9L V6 and 5.9L V8 the engine oil leaks at the distributor can be misdiagnosed as leaks from the intake manifold seal, oil pan gasket, or rear crankshaft (rear main) seal. A revised distributor is available if oil is found inside the distributor.
3 Reports
Excessive oil pressure due to faulty oil pump
The engine may exhibit excessively high oil pressure at cold start up. This may lead to distortion of the oil filter case. Inspect the oil filter case for any signs of distortion. If the case is distorted, Connect an oil pressure gauge to the engine and start the engine while observing the readings. If the pressure reads above 80 psi, replace the oil pump.
3 Reports
High Blower Only Due to Failed Blower Motor Resistor
The HVAC blower may operate on high speed only. This is commonly caused by a failed blower motor resistor. Chrysler has released a revised part to address this problem.
5 Reports
Fuel gauge fluctuation while turning
Some vehicles may exhibit excessive fuel gauge movement while turning corners. Our technicians tell us the repair involves replacing the fuel pump module assambly.
4 Reports
Poor connection at crank sensor
An intermittent connection in the crank position sensor wire connector can cause poor engine performance or the engine may crank but not start.
3 Reports
Increased Oil Consumption Due to Intake Manifold Gasket Leak
On 3.9L V6 and 5.9L V8 engines, the intake manifold gasket may leak and cause increased oil consumption and a spark knock during acceleration; the gasket should be replaced.
3 Reports
No Start Due to Fuel Pump Failure
Insufficient fuel pressure may be caused by particulate contaminates or other type of substances by-passing the primary fuel pick-up screen and resulting in fuel pump failure. Our technicians recommended to replace entire fuel pump module assembly as two (2) filters, primary and secondary are included with the assembly.
5 Reports
Failed transmission due to a restricted cooler
A clogged or restricted transmission fluid cooler system can be the cause of reoccurring transmission failures. Our technicians tell us that if your transmission has failed due to lack of lubrication the transmission fluid cooler and lines should be thoroughly inspected for restrictions.
2 Reports