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!

5,275

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.

105

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

4,745

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 894 nationwide Tribute listings starting at $1,100.

ZIP:

Mazda Tribute Experts

  • #1
    Tom Demyan
    Reputation
    1,040
  • #2
    Js08016
    Reputation
    260
  • #3
    Reelin68
    Reputation
    230
View All

Related Models For Sale

Used Ford Escape
1,056 Great Deals out of 87,253 listings starting at $1,088
Used Honda CR-V
812 Great Deals out of 54,680 listings starting at $1,750
Used Toyota RAV4
821 Great Deals out of 51,119 listings starting at $1,500
Used Subaru Forester
406 Great Deals out of 34,020 listings starting at $1,295
Used Honda Pilot
474 Great Deals out of 30,297 listings starting at $1,444
Used Kia Sorento
476 Great Deals out of 28,987 listings starting at $1,999
Used Toyota 4Runner
298 Great Deals out of 21,851 listings starting at $1,700
Used Nissan Murano
345 Great Deals out of 24,012 listings starting at $1,500
Used Acura MDX
414 Great Deals out of 18,163 listings starting at $1,995

Used Cars For Sale

2011 Mazda Tribute For Sale
28 listings starting at $5,950
2010 Mazda Tribute For Sale
27 listings starting at $3,991
2009 Mazda Tribute For Sale
32 listings starting at $5,950
2008 Mazda Tribute For Sale
4 Great Deals out of 120 listings starting at $3,800
2006 Mazda Tribute For Sale
4 Great Deals out of 122 listings starting at $1,990

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.