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.
Do you
have the same problem?
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No
Tuesday, October 18th, 2022 AT 9:46 AM

3 Replies

Tiny
KEN L
  • ADMIN
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.
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Tuesday, October 18th, 2022 AT 10:10 AM
Tiny
LINDA DIXON2
  • MEMBER
I got the car diagnosed by AutoZone, it was a code P0300.
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Tuesday, October 18th, 2022 AT 10:20 AM
Tiny
KEN L
  • ADMIN
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.
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Wednesday, October 19th, 2022 AT 11:51 AM

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