# 5 cylinder fowls out plugs. What's causing this problem.? Loss of power . ideals very low runs crappy

Asked by Nov 15, 2015 at 03:57 PM about the 1999 Pontiac Firebird Base

Question type: Maintenance & Repair

3 Answers

27,145

low compression...bad rings...bad valve guide...BAD VALVE SEAL....intake manifold gasket leak...cracked head....bad plugs/gap/plug wire....TELL YOU WHAT...U DIDNT SAY WHEN OR HOW LONG....BUT I BET IF YOU TAKE THAT PLUG AND REPLACE IT WITH ONE 2-3 HEAT RANGES HOTTER THAT WILL FIX IT ...FOR ABOUT $2.00...SAY IF YOU HAVE A >R 43 GO UP TO A >R 45 !!!

1 of 1 people found this helpful.
76,905

If you only have one bad cylinder then try a hotter plug which will help burn off the excess oil. How many miles are on the car?

1 of 1 people found this helpful.
70,325

Is it oil fouled or gasoline fouled? If oil fouled it's probably bad rings, or bad valve guide seal on that cylinder. Using a hotter plug, as suggested above should stop the fouling. You can also try a spark plug anti-fouler on that plug as well. If it's gasoline fouled you probably have a bad fuel injector on that cylinder. HTH. - Jim

Your Answer

Firebird

Looking for a Used Firebird in your area?

CarGurus has 781 nationwide Firebird listings starting at $2,999.

ZIP:

Pontiac Firebird Experts

  • #1
    Samuel Moore
    Reputation
    980
  • #2
    dandyoun
    Reputation
    810
  • #3
    John Saffrahn
    Reputation
    700
View All

Related Models For Sale

Used Chevrolet Camaro
416 Great Deals out of 30,916 listings starting at $3,550
Used Ford Mustang
726 Great Deals out of 38,099 listings starting at $895
Used Chevrolet Corvette
301 Great Deals out of 20,672 listings starting at $2,990
Used Ford Mustang SVT Cobra
7 Great Deals out of 288 listings starting at $6,900
Used Ford F-150
2,317 Great Deals out of 184,577 listings starting at $699
Used Chevrolet Silverado 1500
2,113 Great Deals out of 167,056 listings starting at $1,900
Used Chevrolet Monte Carlo
11 Great Deals out of 1,302 listings starting at $2,500
Used Pontiac Grand Prix
29 Great Deals out of 2,738 listings starting at $1,491
Used Chevrolet Impala
515 Great Deals out of 34,210 listings starting at $950
Used BMW 3 Series
1,166 Great Deals out of 33,302 listings starting at $1,000

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.