IDLES UP AND DOWN

2001 Dodge Dakota

Tiny

mmike990

February, 18, 2010 AT 3:59 PM

Engine Mechanical problem
2001 Dodge Dakota V8 Four Wheel Drive Automatic 90000+ miles

My truck has been idling oddly for some time now. It usualy occurs at low speeds but mostly when stopped or just starting the truck. It used to idle at around 1000rpm but now will jump to about 2000rpm at times. Just recently I replaced the TPS becuase of the check engine light but still have the problem. I see from researching most say there is a vacuum leak. Is that the best bet? If so how do I check?

4 Answers

Tiny

Jacobandnickolas

February, 19, 2010 AT 8:57 AM

Has the check engine light come on? Also, yes it could be a vacuum leak. Also, check fuel pump pressure.

Let me know what you find.

Tiny

mmike990

February, 24, 2010 AT 11:25 AM

Yes my check engine light was on but has not come back since I replaced the TPS (about a 2 weeks ago). I'm sorry for being dumb here but how do I check the fuel pressure?

Tiny

mmike990

February, 25, 2010 AT 10:37 PM

After looking through the online manual from mitchell1, I saw that I did NOT change the TPS I changed the Idle Air Control Motor. When I got the error code I was told to get something that sounded like a mix of the TPS and IACM. When I was looking around for the replacement there were a mixture of pictures and name for both so I figured different people called called the same part by a different name. But the diagram shows me that I CHANGED THE IACM NOT THE TPS.

Also I found a very helpful video on 2carpros. Com on checking for fuel pressure (You may have seen it. Just Kidding). Anyway, another thing I can't seem to find in the manual is the fuel pressure levels.

Tiny

mmike990

March, 22, 2010 AT 3:34 PM

For anyone following that hasn't seen my other post. I fixed my rough idle with a good throttle body cleaning and a quick trim of a vacuum line on the right of the throttle body! Hope it helps yall and thanks to the great people at 2carpros!

ALSO, I bought a guage and did a fuel test. Regular pressure should be btw 47 and 51 psi. Mine was at 42psi when key on but engine off and 50psi with engine on. I was not able to test the fuel pressure regulator becuase I cannot drop the gas tank at this time. Since it along with the fuel filter are above the tank : -(

Please login or register to post a reply.

Vacuum Leak Test and Repair - All Cars
Clean Idle Air Control Ford Super Duty 5.4L
Easily Clean Your Throttle Bore Like a Pro
Code Read Retrieval/Clear Scion XD
Code Read Retrieval/Clear - Dodge Stratus