Dodge Ram 2500 with 5.9L Magnum V8 4-wheel driver. The truck is idling at a low rpm once warm, but will run when not moving. When coming down from a slow speed, say 5-10 mph rpms will drop to about 200 and then pop back up to 1300 and fall back down to about 500 rpm, where it is idling or it will stall. When accelerating there has been a significant loss of power, although this development is recent, as it was stalling much before this loss of power. Also when I remove my foot off of the gas pedal the rpms seem to be falling much quicker then they ever have before. I have replaced the IAC Valve, new fuel filter, new catalytic converter, new plugs, plug wires, distributor cap and rotor. Replaced vacuum hoses, and a new battery. The computer is throwing no codes. I have taken it to 4 mechanics including a Dodge/Chrysler dealership and none of them can seem to come up with an option. The fuel pump is putting out the correct PSI even when the problem is occurring and all the cylinders are firing. I had a thorough inspection of all my wires to make sure nothing was falling apart.
Oct 16, 2010 at 7:15 AM
