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I have a 2003 Dodge Ram 1500 5.7 4x2. The RPMs drop from 650 to 500 at a stop light. I have no engine light, no error codes and the truck runs great. When I get to a stop light and the rpms drop, I can lightly tap the accelerator and the RPMs go back to normal, I can put it in neutral and the rpms go back to normal, or I can turn the AC on and the RPMs go back to normal. Any of those steps work. I can keep the AC on or just regular air and the rpms maintain normal levels. The local Dodge dealer has changed the Throttle Body, Camshaft sensor, crankshaft sensor, accelerator control, torque converter, spark plugs, MAF, and battery, so far nothing has repair this issue. Can this be an electrical surge? I don't know what else to check?
 

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The idle air control valve in this truck is built into the throttle body. The Dodge dealer has replaced it three times thinking it was faulty. Place on computer to check for any misfires and nothing shows. No engine codes and no vacuum leaks.
 

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I have a 2003 Dodge Ram 1500 5.7 4x2. The RPMs drop from 650 to 500 at a stop light. I have no engine light, no error codes and the truck runs great. When I get to a stop light and the rpms drop, I can lightly tap the accelerator and the RPMs go back to normal, I can put it in neutral and the rpms go back to normal, or I can turn the AC on and the RPMs go back to normal. Any of those steps work. I can keep the AC on or just regular air and the rpms maintain normal levels. The local Dodge dealer has changed the Throttle Body, Camshaft sensor, crankshaft sensor, accelerator control, torque converter, spark plugs, MAF, and battery, so far nothing has repair this issue. Can this be an electrical surge? I don't know what else to check?
I forgot to mention that I have Long tube headers, cold air intake, 6" lift and 35 Tires
 
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