stalling at highway speeds

2003 BUICK RENDEZVOUS
173,000 MILES • 3.4L • V6 • 2WD • AUTOMATIC
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LOFTIS841
  • MEMBER
  • 3 POSTS
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.
Mar 23, 2018 at 7:02 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,588 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
Mar 26, 2018 at 2:44 AM
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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.
Mar 26, 2018 at 3:45 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,588 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
Mar 26, 2018 at 12:23 PM
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