how many spark plugs do my 1991 lexus ls400 need

Asked by Mar 09, 2013 at 12:03 PM

Question type: Maintenance & Repair

10 Answers


8 beat me to it H25, man this is a freaky configuration- sorry fired too soon-


Hey Bob, it's a V8 - it has two distributors and eight spark plugs - 14_191246_lexus_ignition.gif

Hey, dude...couldn't figure out how you used that elaborate formula and came up with 4....V8...very few engines have 2 plugs per...they do exist but not on a '91 Lex

that is wierd. 2 per ea. as if the explosive mixture can be "more exploded"...a bit like left-hand lugnuts.

I can remember a honda that would dial the spark up twice or was it three times just to make sure someone was home...?

you remember it. a rotor with three little contact points..yuy~

...thinkin' about the two sparkplugs per cylinder is a cheap-shot at reducing the compression by occupying just that extra amount of space...something like a raised dome piston (talk about a machinist's nightmare)-


Good evening Bob. Yes I had a Nissan pick mid 80's with z24 motor 4 cyl with 8 spark plugs. One of the best I've ever owned. My 07 dodge quad cab has the 5.7 v8 with 16 spark plugs. We will see if I end up liking it as much as the z24.


and they fire at different times from their next to ones,good idea for once

Your Answer:


Maintenance & Repair Experts

  • #1
    Tom Demyan
  • #2
  • #3
View All

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.