When I brake, the car stalls and the RPM goes up

Tiny
CHAZ PAYNE
  • MEMBER
  • 2008 DODGE CHARGER
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
So sometimes when I’m driving down the road and tap on the brakes to slow down, the car stalls and the RPM goes over 4,000 RPM's. It fixes when I pull it over and restart the car. And sometimes the car won’t let me go over 35 MPH or 55 MPH, and the RPM's will stay at 3,000. There is also a possible rattle in my engine. This has been going on for a while. I would like to know how to fix it. Any help is appreciated!
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Wednesday, February 26th, 2020 AT 2:45 PM

5 Replies

Tiny
KASEKENNY1
  • EXPERT
Do you have any warning lights on in the dash like the check engine light? The RPM going up like it you are seeing is called limp mode. This is to protect the transmission and engine from major damage when it sees something wrong.

We need to start with checking for codes. If you can't check codes then most parts stores can check them free of charge. Let me know what you find and we can go from there. Thanks
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Wednesday, February 26th, 2020 AT 3:32 PM
Tiny
CHAZ PAYNE
  • MEMBER
Yes there is a check engine light. Thank you
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Wednesday, February 26th, 2020 AT 3:53 PM
Tiny
STEVE W.
  • EXPERT
If the light is on the first thing is to pull the codes to get an idea of what the computer thinks is wrong. The description sounds like it could be oil pressure related if you have a rattle in the engine, or it may also be an issue in the valve-train, like a bad chain or a VVT sprocket. First see what the codes are and post them back here.
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Wednesday, February 26th, 2020 AT 4:08 PM
Tiny
CHAZ PAYNE
  • MEMBER
Okay, so I got a relatively affordable car diagnostics machine last night, I ll send pictures of what it says.
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Thursday, February 27th, 2020 AT 12:07 PM
Tiny
KASEKENNY1
  • EXPERT
Yeah. That is about what I thought. However, this code is more of a secondary code so we need to look for the others that will shed more light on this for us. It looks like this is 1 of 6 codes. More than likely you have some transmission fluid pressure codes or other control issue codes. Unfortunately, based on my experience with these transmission, this code, and what you are describing, we are going to need to go into the transmission and rebuild it or replace it.

However, lets get the rest of the codes first because it could just be a valvebody issue.
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Thursday, February 27th, 2020 AT 6:06 PM

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