Plug number 1 fouls regularly... is it an injector issue?

Asked by Dec 26, 2010 at 01:29 AM about the 2002 Mazda Tribute LX V6

Question type: Maintenance & Repair

No. 1 plug continues to foul while other plugs stay clean. Is this an injector issue, cylinder, or valve issue? What is the best way to prove this out?
Thank you!

5 Answers

55

sounds more like a piston ring issue. Or, more precisely, an oil control ring! sorry!

5,395

Check your plug against the plug chart at http://www.v6z24.com/mods/howto/images/plugs/plugs19.jpg Admittedly these are rather extreme examples but you can find an idea of where to look for the cause of your problem. An oily plug would imply oil is leaking into the cylinder from somewhere (either via the piston or a valve stem). If it's the oil ring on the piston you're in for a nice job, you're best off replacing the piston rings in the engine, which means pretty much an entire teardown. If on the other hand it's a valve stem seal, it's just a case of a bit of headwork. I'd recommend replacing the seals on all the valves or you'd be taking the head apart every few months to replace the next seal to start leaking.

115

I might think a injector would be the fault Have you checked the spark plug lead that its not breaking down under load other than electrical with the current to that particular plug I would get a compression test its possible that a piston ring is broken

4,825

actually it can be either faultu ignition system or a bad valve. u really need to get it checked thoroughly before u can reach to a conclusion. http://mazdatribute.net/mazda-tribute-stereo-removal-procedure/

25

if the plug is fouling with gasoline, I'd start thinking along the lines of Fuel Injector(s) or fuel pressure regulator....

Your Answer

Tribute

Looking for a Used Tribute in your area?

CarGurus has 798 nationwide Tribute listings starting at $1,700.

ZIP:

Mazda Tribute Experts

  • #1
    Tom Demyan
    Reputation
    1,060
  • #2
    Js08016
    Reputation
    260
  • #3
    Reelin68
    Reputation
    250
View All

Related Models For Sale

Used Ford Escape
1,188 Great Deals out of 107,987 listings starting at $850
Used Honda CR-V
802 Great Deals out of 66,751 listings starting at $999
Used Toyota RAV4
828 Great Deals out of 56,037 listings starting at $1,600
Used Jeep Liberty
216 Great Deals out of 7,194 listings starting at $995
Used Nissan Murano
415 Great Deals out of 25,352 listings starting at $400
Used Honda Pilot
628 Great Deals out of 45,131 listings starting at $300
Used Acura MDX
461 Great Deals out of 17,730 listings starting at $2,000
Used Toyota Tacoma
733 Great Deals out of 50,723 listings starting at $1
Used Toyota 4Runner
360 Great Deals out of 27,312 listings starting at $1,750
Used Toyota Corolla
968 Great Deals out of 65,062 listings starting at $850

Used Cars For Sale

2011 Mazda Tribute For Sale
24 listings starting at $4,999
2010 Mazda Tribute For Sale
30 listings starting at $2,995
2009 Mazda Tribute For Sale
28 listings starting at $5,450
2008 Mazda Tribute For Sale
111 listings starting at $2,295
2006 Mazda Tribute For Sale
3 Great Deals out of 140 listings starting at $1,800

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.