One spark plug Burns black
65

Asked by Frank Jan 06, 2017 at 12:19 AM about the 1967 Volvo P1800

Question type: Maintenance & Repair

B18 engine completely
restored running twin
Mikuni carburetors first
spark plug nearest the
radiator burns black all the
rest are chocolate brown
why

1 Answer
188,355

Paul answered 7 years ago

Overly rich fuel/air mixture, dirty air filter, too much driving at low speeds, or idling for a long time. Switch to “hotter” plug. (The higher the plug number, the hotter the plug.) Oil-fouled plug. Wet, black, oily deposits on insulator tip and electrodes.

Mark helpful

Your Answer:

Related Questions

  • One spark plug Burns black 1 Answer

    B18 engine completely restored running twin Mikuni carburetors first spark plug nearest the radiator burns black all the rest are chocolate brown why

    1967 Volvo P1800

    -

    Maintenance & Repair

  • Trying to find someone to work on my '71 Volvo 1800E? 1 Answer

    I have 1971 Volvo 1800E in good shape that has been garaged for the last 3 years. It has some minor electrical and fuel issues. I need to find a competent mechanic/garage that can help me get her ba...

    1971 Volvo P1800

    -

    Maintenance & Repair

  • Can’t get into reverse 1 Answer

    My 67 4 speed with over drive sometimes won’t go into reverse! Not sure why

    1967 Volvo P1800

    -

    Maintenance & Repair

  • i need electrical work on my 67 volvo p1800s 11 Answers

    i turn car on all gauges work if i touch any thing any kind of switch all gauges will die radio stop turn off engine turn engine on they work good touch some thing they stop working head lig...

    1967 Volvo P1800

    -

    Maintenance & Repair

  • how do i boost my horse power 67 volvo p 1800 B18 ENGINE 3 Answers

    hi there i like too boost my 67 volvo P 1800 extra horse power i put on a street performance kit / deck the block / over sized pistons / over sized push rods / double springs / cam / timing gear...

    1967 Volvo P1800

    -

    General

Shortcuts

Search Volvo P1800 Questions

CarGurus Experts

  • #1
    Richard Boettger
    Reputation
    120
  • #2
    chassy
    Reputation
    110
  • #3
    Michael Kane
    Reputation
    60
View All

Find great deals from top-rated dealers

Search

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. Content will be removed if CarGurus becomes aware that it violates our policies.