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

31,345

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.

8,115

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

Your Answer

Chevrolet Cavalier Experts

  • #1
    John Saffrahn
    Reputation
    3,090
  • #2
    dandyoun
    Reputation
    1,380
  • #3
    mbar1
    Reputation
    1,250
View All

Related Models For Sale

Used Chevrolet Impala
521 Great Deals out of 33,152 listings starting at $1,495
Used Honda Civic
692 Great Deals out of 52,971 listings starting at $1,200
Used Toyota Corolla
872 Great Deals out of 65,253 listings starting at $1,250
Used Ford Mustang
438 Great Deals out of 42,786 listings starting at $1,488
Used Toyota Camry
1,082 Great Deals out of 75,995 listings starting at $1,000
Used Honda Accord
884 Great Deals out of 79,047 listings starting at $1,444
Used Chevrolet Camaro
497 Great Deals out of 31,052 listings starting at $2,495
Used Chevrolet Corvette
108 Great Deals out of 16,076 listings starting at $3,000
Used Dodge Charger
428 Great Deals out of 35,049 listings starting at $2,000

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.