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1999 Buick Lesabre Car RPM Flucuating and Stall

Tiny
REFIEL1
  • MEMBER
  • 1999 BUICK LESABRE
  • 3.8L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 295,000 MILES
The problem is my car will be driving just fine and it seems that after a while of driving once it begins to heat up, I'll be driving down the road and my rpms will bounce around and when they bounce below 1000 rpm the car gives a kick like it was about to cut off, but cuts itself back on. Periodically it will stall when it does so. I've replaced the idle air control valve, and I've had my maf sensor and throttle body cleaned. But the problem is still consistenting.
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Saturday, April 18th, 2015 AT 2:36 PM

3 Replies

Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
EVER CHANGE THE FUEL FILTER?

CHECK YOUR FUEL PRESSURE WITH A GAUGE

THE MEDIC
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Saturday, April 18th, 2015 AT 7:52 PM
Tiny
REFIEL1
  • MEMBER
  • 2 POSTS
Yes, I've replaced the fuel filter and I also replaced the fuel pressure regulator.
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Sunday, April 19th, 2015 AT 6:01 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
AND THE ACTUAL PRESSURE IS?

THE MEDIC
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Sunday, April 19th, 2015 AT 9:43 AM

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