Engine shutting off when accelerating hard, rough idle and white smoke coming from the exhaust

Tiny
JTS234
  • MEMBER
  • 1992 OLDSMOBILE CUTLASS
  • 3.1L
  • V6
  • 2WD
  • AUTOMATIC
  • 73,000 MILES
I have the car listed above Supreme S. The car has been shutting off with hard acceleration, rough idling, white smoke out of the exhaust that smells like raw gas, gas in the oil, and fouled spark plugs. I have checked the coil pack, throttle position sensor, and I’ve even bridged port A and B to see if it’s giving off a code. Even though there is no check engine light. Can anyone give me any ideas as to what is wrong with my car? Any help would be greatly appreciated.
Tuesday, January 21st, 2020 AT 5:38 AM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

The most common failure for this is the fuel pressure regulator. It has a vacuum line on the regulator. If you turn the key to the on position, remove the hose and see if fuel comes out. That will tell you if you have a bad regulator.

Roy
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Tuesday, January 21st, 2020 AT 9:58 AM
Tiny
JTS234
  • MEMBER
  • 10 POSTS
I turned the key and no fuel came out of the vacuum line. I know I can also pressure test it but I’m not sure if it’s worth it. Do you know what else it could be?
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Tuesday, January 21st, 2020 AT 10:38 AM
Tiny
JTS234
  • MEMBER
  • 10 POSTS
I also uploaded what my fuel pressure regulator looks like.
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Tuesday, January 21st, 2020 AT 10:39 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, that is the 3.3 engine, not the 3.1.

Okay, the only other way that fuel can get into the system like that is from the injectors.

I would release the fuel rail and lift it up with the injectors attached. Turn the key on and see if any of the injectors are leaking.

Roy
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Tuesday, January 21st, 2020 AT 10:53 AM
Tiny
JTS234
  • MEMBER
  • 10 POSTS
That’s weird the top of the engine says 3.1 but hey I’ll take your word for it. I’ll also tested the injectors next. Thank you for the help and I’ll let you know what happens.
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Tuesday, January 21st, 2020 AT 1:11 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Keep us updated.

Roy
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Tuesday, January 21st, 2020 AT 1:12 PM

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