Spark plugs, seal, exhaust, cat converter, map sensor????

Asked by Apr 23, 2017 at 12:51 AM about the 2000 Mazda Millenia 4 Dr Millennium Supercharged Sedan

Question type: Maintenance & Repair

Where tooooo start!!!  Bought used 2000 madza
millennia supercharge. After 1 month has knock
,vibration, codes,oil, and honey combed shaped
buildup from converter in exhaust, overheating
inside car melting foam and burning..... Codes are
for map sensor and spark plug. Oil is found in
cylinder 6 spark plug.... Bad idle and acceleration.
Horrible in gas! I have no idea where to start

1 Answer

299,435

Start with a compression test to determine if you get a low pressure reading on cylinder #6. Cats getting hot is an indication of unburnt fuel entering the exhaust. The cats will clog quickly if not taken care of.

Your Answer:

Mazda Millenia Experts

  • #1
    Steven Cisneros
    Reputation
    790
  • #2
    Keith12345
    Reputation
    420
  • #3
    Tom Demyan
    Reputation
    250
View All

Related Models For Sale

Used Honda Accord
706 Great Deals out of 102,595 listings starting at $999
Used Mazda MX-5 Miata
49 Great Deals out of 4,350 listings starting at $1,995
Used Acura TL
77 Great Deals out of 3,461 listings starting at $799
Used Toyota Camry
851 Great Deals out of 71,101 listings starting at $1,000
Used Mazda Protege
182 listings
Used Ford Mustang
296 Great Deals out of 39,978 listings starting at $1,312
Used Lexus ES 300
17 Great Deals out of 654 listings starting at $1,222
Used Ford Crown Victoria
3 Great Deals out of 749 listings starting at $3,795
Used Mazda 626
118 listings starting at $1,795

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.