How do I do a throttle flushing on my 1999 Dodge Ram 1500 SLT?

I've taken my Dodge into the dealership's shop twice & they said that they did a throttle flushing on it, but it still is doing the same things. When I drive it, the RPM's flucuates between driving at 40-70 MPH. The engine revs up & makes the truck feels like it's surging. Sounds like I'm revving the engine to race the truck, but I'm not. The truck has 73,000 miles on it & has never been worked on previously. Just had it completely tuned & the throttle flushing. The dealership is baffled by what the truck is still doing & doesn't know what to do to fix it. I've already spent $753 & still is the same condition. Any help would be appreciated!

 

try cleaning your tps

 

sorry but what is a tps? lol

 

TPS = Throttle Position Sensor.
Tell's the PCM how wide open the throttle is, so the PCM can work its magic and adjust air/fuel mixture.

 

Sounds like you have a vacuum leak somewhere in the intake system. Could be a gasket or a loose bolt. Air is getting sucked in through somewhere beyond the throttle body, causing the revs to go up involuntarily.

Another explanation could be that the transmission is slipping at that 40-70 speed, and the engine is just revving like you pushed in the clutch. Is your speed going up when the engine surges?

More than likely it's my first suggestion because you recently got the throttle flushed. Maybe they used too much of it, or the wrong type and it damaged a gasket or something. If the TPS is ok and there's no CEL (Check Engine Light), take it back to where you got it tuned. I recommend Mopar Combustion Chamber Cleaner next time, paying close attention to the instructions.

 

Check the plenum gasket. Are you going though any oil, any pinging? Its at the bottom of the intake and it is known to go on the dodges. Take the air hat off and look down the throttle body butterflies and see if you see any oil pooling in, if you do then the plenum is shot.

 

I would guess it would be either the TPS (I don't know how you would go about cleaning one BTW; best off to replace it) or a problem with your torque converter and/or its lock up circuitry. When it surges, how many rpm's are we talking about?

Also, ask the dealership just exactly what a throttle flush is, and post their answer here so we can tell you if you're getting the run around. I have heard of cleaning the throttle body, using a variety of cleaners to clean fuel lines, injectors, and to de-carbon combustion chambers, but I have never heard of a throttle flush.