2003 Dodge Dakota RPM Fluctuations

Has the check engine light come on?

Joe

No the check engine light has not came on.

Without a check engine light, I would start by checking vacuum hoses for leaks. Also, I want you to check fuel pump pressure. Here is a how to for checking:

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

The reason I'm asking for these thing is because there is no light. THe check engine would have indicated a problem with an electrical component or sensor.

You will need a fuel pressure tester. Most parts stores will lend or rent one to you.

Let me know what you find.

Joe

As I stated in my last email, I performed a fuel pressure test on my truck and the pressure read 49.2 psi, according to the specifications this is the normal reading for my Dodge truck. I have also checked every vaccuum hole for leaks and none were found. Again, NO CHECK ENGINE LIGHT HAS CAME ON.

Thanks, Dennis

I'm having the exact same problems w/ my 03 Dakota...could it be the Purge Control Solenoid?

I don't know if it the Purge Control Solenoid at this point I am checking out all suggestion. All I do know is it's a pain trying to figure out what is causing this RPM problem. Still there is no check engine light yet.

Dennis

Try this...disconnect the VAC line that is connected to your TPS. If you follow the Purge Control Solenoid VAC line...up to the TPS...it should be just a slip on connection. It's the only line that leads from the Purge Control Solenoid...up to the top portion of your engine. I disconnected mine...and the RPM issue seems to have resolved...leading me to believe its the solenoid. If you have the same results...that would be pretty compelling evidence to see if you can find one at the local junk yard. I've priced them new and they are "dealer only" items...costing about $108. Let me know...Thanks!

I had the same problem with my 2001 dakota and it was the throttle position sensor!!