why does my 78 280z keep fouling plugs

25

Asked by Jun 04, 2013 at 07:40 PM about the Datsun 280Z

Question type: Maintenance & Repair

2 Answers

445

Being an older motor, plug fouling may be caused by worn internal engine components (rings/valves allowing oil to get into combustion chamber at a greater rate than can be burned off by ignition in chamber)

60

also could be ignition system, air fuel regulator, faulty water temp sensor telling engine to dump more fuel. sounds like it is running rich. worn rings will have symptoms like smoke on startup, blue smoke etc.

Your Answer

Add photo

Related Questions

  • what's the most likely component that would make a Z run really rich? 7 answers

    It runs so rich that it fouls out spark plugs in short order.

    1977 Datsun 280Z

    -

    Maintenance & Repair

  • Repair 1 answer

    My 1977 280z Datsun keeps lurching while I'm driving. It's been happening a lot lately and it backfires. What could it possibly be?

    Datsun 280Z

    -

    Maintenance & Repair

  • I have a 1977 Datsun 280z with an a starting problem 4 answers

    I recently purchased a 1977, 280Z. Sometimes it starts with the key and sometimes, mostly, it doesn't. I know for sure it is not the battery and I have tested the starter and when I short wire it,...

    1977 Datsun 280Z

    -

    Maintenance & Repair

  • not starting 5 answers

    my 1978 280z sat in a garage 3yrs,wont start if it does it will only run for 5mintues or so,then it acts like it is running out of gas

    1978 Datsun 280Z

    -

    Maintenance & Repair

  • why does my fuel pump run all the time when key is on 3 answers

    car fouls plugs after running for 15min.

    Datsun 260Z

    -

    Maintenance & Repair

Search Datsun 280Z Questions

Datsun 280Z Experts

#1 F_O_R
F_O_R
Reputation 130
#2 tennisshoes
tennisshoes
Reputation 120
#3 Andrew Olsen
Andrew Olsen
Reputation 90
View All

Related Models For Sale

Used Datsun 240Z
7 listings
Used Datsun 280ZX
13 listings
Used Datsun 260Z
2 listings
Used Nissan 300ZX
135 listings starting at $3,995
Used Ford Mustang
310 Great Deals out of 45,395 listings starting at $2,000
Used Nissan 350Z
52 Great Deals out of 1,281 listings starting at $3,995
Used Chevrolet Corvette
138 Great Deals out of 20,703 listings starting at $3,499
Used Nissan 370Z
34 Great Deals out of 3,125 listings starting at $8,900
Used Mazda MX-5 Miata
36 Great Deals out of 4,949 listings starting at $2,300
Used Nissan 240SX
18 listings
Used Nissan GT-R
587 listings starting at $49,500
Used Chevrolet Camaro
146 Great Deals out of 35,590 listings starting at $1,995
Used Toyota Supra
51 listings
Used Subaru BRZ
8 Great Deals out of 934 listings starting at $14,500