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Thread: Driving with fouled plugs

  1. #1
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    Driving with fouled plugs

    Accidentally fouled a couple plugs on my 70 911S and it wont clear so taking to the shop. Is it safe to drive 5 miles slowly with fouled plugs or should I get a tow??
    1969 911S Targa
    1970 911S Coupe
    1973 911T w 3.2
    1972 Alfa GTV 2000

  2. #2
    member #1515
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    How did the plugs get fouled? Are you sure it's fouled plugs and not another problem?
    What plugs are you using?
    David

    '73 S Targa #0830 2.7 MFI rebuilt to RS specs

  3. #3
    Oil Cooled Heart Bullethead's Avatar
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    Easier to pull the plugs and clean them rather than call for a tow, and a bunch cheaper.

    Anyway, what David asks... what temp plugs are you running?
    Russ

    ESR # 1537

    '62 356S Notchback Hotrod
    '67 S Das Geburtstagsgeschenk
    '68 T Targa Sportomatic
    '68 L SW Targa Sportomatic
    '70 914/6 GT

  4. #4
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    Same plugs have used for 20+ years. 2.7 MFI engine has been "built" some and has crankfire. If the plugs foul that is it. Happened a few times when first built as we got it dialed in. But never since. I had a new enrichment kit put on for cold starts instead of the old screw system I used for years where I had to open the lid and turn the screw on the pump out a few turns. Warm the car and then jump basck around back and tighten the screw. Now I can the same thing from the seat BUT it is new and I over-enriched it the first try. Fouled a couple plugs. But usually runs perfectly and has since build in 1993. Has dynoed at 220 HP at rear wheels on pump gas. I just dont like getting in there and messing with the plugs--I am not handy and not patient. It's worth the money to have a pro do that stuff. I'll stick with what I can do well. Learned that the expensive hard way many years ago.
    So drive slowly (30 mph or so) or tow??
    1969 911S Targa
    1970 911S Coupe
    1973 911T w 3.2
    1972 Alfa GTV 2000

  5. #5
    Senior Member Cliff's Avatar
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    how far is the tow?.....less stress
    To err is human; to blame it on someone else is more human...

    "You must always strive to be the best, but you must never believe that you are."
    —Juan Manuel Fangio[48]

    ”What would PORSCHE do”

    67 911 de Luxe, 356 B silver metallic / brown interior, ( buck skin really ) 67 PORSCHE [ built ] 912, Crystal blue, black interior, 72 T, Silver metallic/black interior, appearance group,factory AC.

  6. #6
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    Generally, the way to unfoul plugs (unheard of with unleaded fuels now) is to take it out on the road and really romp on it.

  7. #7
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    Romping on it will bake on the fouling , drive moderately and no lugging .

  8. #8
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    Lets rationalize this issue. Drive 5 miles to the shop or get a tow to the shop? Your car will not clear its plugs. You want to leave the care of your car to professionals because you wrote: "I just dont like getting in there and messing with the plugs--I am not handy and not patient."

    Case closed. Call a flat bed and breathe easier knowing you won't hurt the car driving it five miles. You and I have both learned from our past mistakes, all of us have. Tow the car and give yourself peace of mind.

  9. #9
    member #1515
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    I can't remember the last time I had a fouled plug, let alone several at the same time. If indeed that is your problem, something else is wrong with your car.
    David

    '73 S Targa #0830 2.7 MFI rebuilt to RS specs

  10. #10
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    I'm with RSTarga , fouled plugs with todays fuel ? I also can't remember the last time .

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