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.
Resources for the Repair and Maintenance of your 1998 Dodge Ram Van 1500
1998 Dodge Ram Van 1500
1998 Dodge Ram Van 1500 Problems
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.
Some vehicles may exhibit one or more of the following: Spark knock complaints when the vehicle is under load, various single cylinder misfire, and surge in 4th gear (around 45 mph). Our technicians tell us that rerouting the coil and spark plug wires to minimize induction effects will commonly correct this condition. If wires must cross during the reroute procedure, they must cross at a 90 degree angle.
Leak detection pump failure can be caused by the internal diaphragm switch sticking, or in some cases, contamination from debris or carbon particles from vapor canister. If black carbon particles are present in the LDP, replace vapor canister in addition to LDP. The purge solenoid should also be checked for debris or carbon contamination and replaced as necessary. All evap system hoses are subject to cracking and splitting causing leaks, Inspe...
On the 3.9L V6, 5.2L V8 and 5.9L V8 the Oil leaks commonly from the valve cover gaskets, intake manifold gaskets (front and rear), timing cover gaskets, distributor O-ring, and the rear main seal area. Using fluorescent engine oil dye can be helpful in determining the source(s) of the oil leak.
1998 Dodge Ram Van 1500 Recalls (Recent)
1998 Dodge Ram Van 1500 Questions and Answers
How do i find the transmission type in my van and model # of the transmission
Bought the Van yesterday and run fine shifting nicely for about 40 mls. Turned the corner at stoplight and that was it. Engine runs perfect, revs up but van does not move anymore. I can feel the sl...
when the truck is under a load the air will only come out of the defroster as soon as i let off the gas the air will go back to the dash vents
what is the procedure for replacing the heater blower motor and approx how long might it take?
yesterday we had alot of snow, the wipers worked a couple cycles then stopped, fuse had blown and when I replace the fuse they blow as soon as the key is turned to the on position, I checked for sn...