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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
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Saturday, February 23rd, 2019 AT 7:51 AM

6 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,345 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
  • MASTER CERTIFIED MECHANIC
  • 48,345 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
  • MEMBER
  • 5 POSTS
No vacuum leaks.
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Friday, March 1st, 2019 AT 3:59 PM
Tiny
BRAD423
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  • 5 POSTS
Yes no codes appeared.
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Friday, March 1st, 2019 AT 3:59 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,345 POSTS
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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