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Stalling at highway speeds

Tiny
LOFTIS841
  • MEMBER
  • 2003 BUICK RENDEZVOUS
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 173,000 MILES
It is showing 31.3 on the longft1 sensor on my obd2 scanner an the EGR says it has a bad ground or bad five volt wire. I put the new EGR on last week an this started yesterday. While driving down the road it will stall like it is trying to shut off but not shut off like it is running out of gas. But it has a full take and has good fuel pressure.
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Friday, March 23rd, 2018 AT 2:02 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Hello,

When you replaced the EGR did you use an AC Delco unit? Also, did you clear the codes and have they come back? After market parts can fail quickly causing the engine to stall if the valve fails to close.

Please let us know.

Cheers, Ken
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Monday, March 26th, 2018 AT 9:44 AM
Tiny
LOFTIS841
  • MEMBER
  • 3 POSTS
Yes, I did clear the codes and I did put an AC Delco part. Now it is stalling when I turn a corner.
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Monday, March 26th, 2018 AT 10:45 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Does it only stall when you are turning or does it stall when you come to a stop? We should run the codes.

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

Please let us know what happens.

Cheers, Ken
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Monday, March 26th, 2018 AT 7:23 PM

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