When I drive my truck for about 20 minutes and it gets up to temperature the motor will sputter once or twice at a red light then will stop

Tiny
RAGUEVAN
  • MEMBER
  • 2004 DODGE RAM
  • 5.9L
  • 6 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 205,000 MILES
The RPMs will drop almost to stalling then return back to normal idle while in drive. It does it in all gears. I haven’t been able to find any symptoms of anything either
Monday, June 20th, 2022 AT 9:38 PM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 44,370 POSTS
This can happen when the throttle actuator gets dirty and needs to be serviced. Here is a generic guide to help you see wat you are in for and specific instructions in the diagrams below to show you on our car:

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

it can also be a vacuum leak which is common please, do this check when the engine is cold.

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

Check out the diagrams (below). Please let us know what happens.
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Wednesday, June 22nd, 2022 AT 7:48 AM
Tiny
RAGUEVAN
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Hey Ken, thanks for the great information. I forgot to mention that it is a diesel truck. I don’t know if that changes any of the diagnosis. I totally forgot to mention that in the first question.
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Wednesday, June 22nd, 2022 AT 8:43 AM
Tiny
KEN L
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You can still use the guides, but it sounds smore like the engine coolant sensor is shorting out. but we should run the codes first, here is a guide to follow, let me know what you come up with:

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

Please run down this guide and report back.
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Thursday, June 23rd, 2022 AT 9:22 AM
Tiny
RAGUEVAN
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No codes show up when the problems happen. That’s why I was a little stumped with this issue.
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Thursday, June 23rd, 2022 AT 7:34 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 44,370 POSTS
I would start by servicing the fuel filters; you could have water in the fuel. here is a video to help and instructions for your truck in the diagrams below:

https://youtu.be/6de-1mIpzi8

Check out the diagrams (below). Please let us know what happens.
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Friday, June 24th, 2022 AT 9:30 AM

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