Does not accelerate, it jerks and sputters and will not over 15 mph

Tiny
CHEVYLADY520
  • MEMBER
  • 2004 DODGE RAM
  • 5.7L
  • V8
  • 2WD
  • MANUAL
I have the truck listed above 2500 5.7 hemi. When I'm driving down the road my truck won't go over 15 mph and it sputters jerks and will not accelerate. I've noticed a huge separation in exhaust after converter. What is the cause for lack of accelerate and bogging out is it muffler?
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Friday, May 22nd, 2020 AT 9:26 AM

2 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

I'm not sure I understand what you mean by separation in exhaust after converter. Can you explain? It honestly could be a plugged catalytic converter. That will cause the symptoms you mentioned. Take a look through this link. It describes symptoms of a plugged catalytic converter. See if it mirrors what you experience. The second link explains how to test a catalytic converter.

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

The second link explains removal of the converter to test. However, if you remove an oxygen sensor before the converter, often time that small amount of opening will created a noticeable improvement if the converter is plugged.

Additionally, I would imagine the check engine light is on. If you haven't already, the computer should be scanned for diagnostic trouble codes. If it is a converter issue, chances are you will find a P0420 indicating converter operating below threshold.

Let me know exactly what you were referring to, and if it is with the exhaust, try the test I suggested and let me know the results.

Take care,
Joe
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Friday, May 22nd, 2020 AT 6:07 PM
Tiny
KASEKENNY1
  • EXPERT
Can you get a picture of the separation in the exhaust to start? Next we need to monitor fuel pressure to find out if the pump is weak. Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Once we know what the pressure is, we need to check for codes. Even if the light is not flashing or on, we could still have a code to point us in the right direction.

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

Let me know this info and we can go from there. Thanks
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Friday, May 22nd, 2020 AT 6:14 PM

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