RPM's stay up

Tiny
BRAD423
  • MEMBER
  • 2004 DODGE RAM
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
There is no check engine light. When releasing the gas pedal the rpm's stay up at or around 2 gradually go down. I've replaced crank sensor, knock sensor and plugs. It was stalling that went away, but couple weeks later this problem came along. Please help
Saturday, February 23rd, 2019 AT 7:51 AM

6 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,621 POSTS
Hello,

I would service the throttle bore first. Here is a guide to help we should also run the codes even though there is no light:

https://www.2carpros.com/articles/throttle-actuator-service

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down these guides and report back.
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Monday, February 25th, 2019 AT 12:09 PM
Tiny
BRAD423
  • MEMBER
  • 5 POSTS
I cleaned throttle body at the same time I replaced sensors. It is lacking power on take off.
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Thursday, February 28th, 2019 AT 9:25 AM
Tiny
KEN L
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  • 50,621 POSTS
Lets check for vacuum leaks. also please remove the MAP sensor to see if it holds vacuum. And did you run the codes?

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Check out the diagrams (below). Please let us know what you find.
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Thursday, February 28th, 2019 AT 12:08 PM
Tiny
BRAD423
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  • 5 POSTS
No vacuum leaks.
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Friday, March 1st, 2019 AT 3:59 PM
Tiny
BRAD423
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Yes no codes appeared.
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Friday, March 1st, 2019 AT 3:59 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Does the MAP sensor hold vacuum? I would try replacing the sensor I have seen them cause high idle. If that does not work I would replace the PCM with a rebuilt or used unit. Here is the location. If you get a rebuilt one give your VIN so it can be programmed. Check out the diagrams (Below). Please let us know what happens.
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Saturday, March 2nd, 2019 AT 11:49 AM

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