what would make a exhaust manifold glow bright red in a 1986 chevy caviler

Asked by Dec 06, 2014 at 08:28 PM about the 1986 Chevrolet Cavalier

Question type: Maintenance & Repair

my husband drove my car around the block and he came home and my exhaust manifold
was glowing bright ass red and was sparking.

2 Answers

28,055

An engine that runs extremely lean or extremely rich will do this, as well as a bad catalytic converter. Retarded timing can also cause this. Under no circumstances would I continue driving it. You might have 1) bad catalytic converter, 2) a bad sensor (lean/rich fuel mixtures might be due to a bad oxygen or MAF sensor), or 3) the timing is off. I'll assume since you make no mention of the car running badly that there isn't anything obviously wrong with the engine so eliminate the timing and bad sensors as the culprit, it is most likely a bad catalytic converter. However check all your sensors and intake system are good/clean as an improper fuel mixture can prematurely ruin a catalytic converter. PS: a sign of a bad cat is a rotten egg odor.

7,985

your catalytic converter collapsed.. is the engine running cold? = bad coolant thermostat.

Your Answer

Chevrolet Cavalier Experts

  • #1
    John Saffrahn
    Reputation
    3,060
  • #2
    dandyoun
    Reputation
    1,380
  • #3
    mbar1
    Reputation
    1,220
View All

Related Models For Sale

Used Honda Civic
773 Great Deals out of 68,045 listings starting at $999
Used Chevrolet Impala
563 Great Deals out of 36,766 listings starting at $990
Used Chevrolet Camaro
500 Great Deals out of 33,566 listings starting at $1,450
Used Toyota Corolla
971 Great Deals out of 65,173 listings starting at $850
Used Honda Accord
1,199 Great Deals out of 74,737 listings starting at $561
Used Ford Mustang
607 Great Deals out of 39,015 listings starting at $1,500
Used Chevrolet Monte Carlo
9 Great Deals out of 1,237 listings starting at $1,488
Used Toyota Camry
1,007 Great Deals out of 101,180 listings starting at $300
Used Chevrolet S-10
16 Great Deals out of 1,209 listings starting at $1,550

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.