Stalling or try to reverse it cuts off?

Tiny
LINDA DIXON2
  • MEMBER
  • 2003 BUICK RENDEZVOUS
  • 3.4L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 181,000 MILES
I start the car once I start or try to reverse it cuts off. I have to press the gas to get it back started and actually take off.
Tuesday, October 18th, 2022 AT 9:46 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
This is common when the throttle bore needs to be serviced. IAC motor needs to be replaced or you have a vacuum leak. here are two guides to help you fix the problem with instructions in the diagrams below to help you with your car:

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

And this guide, only do this when the engine is cold:

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

This guide can help as well:

https://www.2carpros.com/articles/stall-at-idle

Can you please shoot a quick video with your phone so I can hear the engine stall? That way I can tell for sure what's going on. You can upload it here with your response.

Check out the images (below). Please let us know what happens.
Was this
answer
helpful?
Yes
No
Tuesday, October 18th, 2022 AT 10:10 AM
Tiny
LINDA DIXON2
  • MEMBER
  • 2 POSTS
I got the car diagnosed by AutoZone, it was a code P0300.
Was this
answer
helpful?
Yes
No
Tuesday, October 18th, 2022 AT 10:20 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
Okay, usually when this code is present it will be the fuel pump is going out or you have a MAF sensor that has gone out here is the location of the sensor so you can check it out. also, to check the fuel pressure you can follow this guide:

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

Fuel Pressure (Key ON Engine OFF) .................... 358-405 kPa (52-59 psi)

Check out the diagrams (below). Please let us know what happens.
Was this
answer
helpful?
Yes
No
Wednesday, October 19th, 2022 AT 11:51 AM

Please login or register to post a reply.

Sponsored links