What can cause oil to shoot into the carburetor?


Asked by Apr 17, 2013 at 10:58 AM about the 1980 Oldsmobile Cutlass Supreme

Question type: Maintenance & Repair

My 1980 Cutlass Supreme, equipped with the original V6 with 77,6xx original miles, has oil in the carburetor... I had an oil change about 300 miles ago (two months ago), it is now black, thick, and low... Gave one quart to it... My engine light also comes on, but it goes off when accelerating... As soon as I press the brake it comes back on... What can cause oil in the carb and my check engine light to come on as it does?

6 Answers

PCV system~~ It draws air from crankcase and has a supply to crankcase from the air filter for the fresh air. If the PCV is not valve working, blowby, pushing air in to crankcase and no vacuum from PCV the crankcase can actually get pressurized, and that can happen oil comes up supply hose backward

2 out of 2 people think this is helpful.
Tom Demyan

Bad valve seals will cause this issue. Are the spark plugs fouled? Pull each one to find out, I'd also do a compression check of each cylinder while your at it. Are you prepared to do some engine work on a 33 year old car? As to the check engine light, you will need to read the codes to determine why it's popping on, we'd only be guess at this point.

4 out of 4 people think this is helpful.

Listen to Tom...strongly recommended to do that..

1 out of 1 people think this is helpful.

I don't think a 1980 vehicle had a check engine light. That was before computers and fuel injection. It could have one of the early "trouble" lights (low oil pressure, overheating, or charging system problems).

3 out of 3 people think this is helpful.

Thank you all so much! Recently, the PCV system has been replaced as well as the valve cover gaskets. I'll check the spark plugs and see if they are fouled... A full tune-up was done when I got my oil changed... I'll keep you all posted! My 1980 has the lights on the dash for engine, generator, and seat belt... I don't have the temperature and oil gauges though... Thanks again!!

1 out of 1 people think this is helpful.

No body is explaining what makes the engine light to come on, where does the power come from and what makes the light go off when car is running.

Your Answer

Add photo

Related Questions

Cutlass Supreme

Looking for a Used Cutlass Supreme in your area?

CarGurus has 148 nationwide Cutlass Supreme listings and the tools to find you a great deal.


Search Oldsmobile Cutlass Supreme Questions

Oldsmobile Cutlass Supreme Experts

#1 munron
Reputation 540
#2 tennisshoes
Reputation 350
#3 Tom Demyan
Tom Demyan
Reputation 310
View All

Related Models For Sale

Used Chevrolet Monte Carlo"
7 Great Deals out of 2,061 listings starting at $3,850
Used Buick Regal"
182 Great Deals out of 10,509 listings starting at $1,995
Used Chevrolet Impala"
891 Great Deals out of 35,538 listings starting at $795
Used Chevrolet Caprice"
199 listings starting at $10,900
Used Ford Mustang"
724 Great Deals out of 41,220 listings starting at $900
Used Chevrolet Corvette"
425 Great Deals out of 20,185 listings starting at $3,688
Used Pontiac Grand Prix"
28 Great Deals out of 4,372 listings starting at $1,500
Used Chevrolet Camaro"
810 Great Deals out of 39,038 listings starting at $2,650
Used Ford F-150"
3,167 Great Deals out of 215,797 listings starting at $1,000
Used Chevrolet Malibu"
1,101 Great Deals out of 72,184 listings starting at $1,300