1998 Dodge Ram Van 2500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1998 Dodge Ram Van 2500
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
1998 Dodge Ram Van 2500 ProblemsHVAC 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.
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.
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, Inspect hoses carefully. In cases of contamination from carbon particles or debris, all hoses and tubes must be blown out with compressed air to remove contaminates.
1998 Dodge Ram Van 2500 Questionsheater temp control problem (2 answers)
when i went to turn the temp control to hot, there was a click and the nob turned real free. even after the engine got warm all i had was cold air, i believe the problem is the temp control nob, it had been sticking
need the location of the fuel filter
spark at dist cap none at plugs changed pickup in dist same problem