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 2500
1999 Dodge Ram Van 2500
1999 Dodge Ram Van 2500 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.
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...
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 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 2500 Questions and Answers
Is there and where is the fluid check point for the overdrive and how do I check it. I bought this used with no manual and the overdrive seems to slip in and out occasionally. I don't want to ...
I have a V10 engine and no oil pressure and when I take off the oil filter off to see if there is oil coming out when I start it, there is none. The oil pump must have gone out. But the dealer part...
engine cuts out,replaced crank senser-fuel pump-coil-auto shut off relay-fuel pump relay
it seems everything computer controlled cuts out,cuts out when ever,before it will restart you can hear a r...
during start attempt, just clicks, bench tests fine at autozone.