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 1999 Dodge Ram Van 3500
1999 Dodge Ram Van 3500
1999 Dodge Ram Van 3500 Problems
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.
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, Inspe...
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.
1999 Dodge Ram Van 3500 Questions and Answers
cuando prendo el aire acondicionado en vez de sacar aire frio saca aire caliente que es lo que nesecita para que lance aire frio?
on my Dodge Ram 3500 Van 1999, after determining that I was getting no spark to the distributor I dirconected the connector from the coil and checked with a test light while my son cranked the eng...
how do you know when you need a ignition switch, or a crankshaft sensor or a ecm?
the coil was replaced about a month ago ran for two weeks and wont run now. the coil is giving no spark, is there a way i can test the coil or is it another problem?