1999 Dodge Ram Van 1500 Repair and Maintenance Costs
A guide to repairs, service, and maintenance costs for your 1999 Dodge Ram Van 1500
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1999 Dodge Ram Van 1500 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.
1999 Dodge Ram Van 1500 QuestionsIdle lope (1 answer)
Idle lope cold ,warm aswell.Goes up to2200rpm
So were do I start the hunt for the problem