SPONSORED LINKS

Dropping RPMs while running 55 MPH or slower

Tiny
DENNIS19985
  • MEMBER
  • 2001 BUICK PARK AVENUE
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 216,000 MILES
My car will drop from 2,000 RPMs down to 1.5 once I get up to a steady speed between 30 and 55 MPH then is will sputter and act like its choking itself or going into limp mode and just doesn't want to pick up any speed or accelerate or anything. I have put over $2,000.00 in this car between brakes, headlights, tires TPS, EGR valve, 2 gaskets for EGR and a thermostat plus regular maintenance. I could really use some help figuring out what actual part I need to buy to truly get it fixed.
SPONSORED LINKS
Thursday, April 29th, 2021 AT 8:05 PM

1 Reply

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Does your Check Engine light on when this sputtering happens? What we ask you to do is perform a CAN scan to retrieve all code information from your car. A CAN scan will test all the systems on your car including any issues you've just mentioned. Here is a tutorial showing what is involved for a CAN scan:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

After performing this procedure get back to us with all stored code information and then we can properly diagnose these issues with your vehicle. Hope this helps and thanks for using 2CarPros.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, April 29th, 2021 AT 10:35 PM

Please login or register to post a reply.

Related Engine Revs Up Content

Idle Air Control Motor Replacement
GUIDE
Idle Air Control Motor Replacement
The idle air control motor or idle speed control motor is designed to adjust the air flow into the intake manifold at engine idle. Engine idle speed is monitored by the PCM...
VIEW MORE

Sponsored links