I recently replaced the computer in my 2002 Toyota 4-runner. Now my car is again misfiring and my mechanic says one of the cylinders is shot. Is this something they could've found when my spark plugs were also replaced?

Asked by Nov 10, 2015 at 07:52 PM about the 2002 Toyota 4Runner SR5 4WD

Question type: Maintenance & Repair

In diagnosing the computer problem, my mechanic went over my car
thoroughly before diagnosing the computer malfunction.  Shouldn't he have
noticed a faulty cylinder?

6 Answers

76,925

If your computer was malfunctioning then your mechanic may not have been able to detect the misfire. What exactly do you mean by a faulty cylinder?

3 of 3 people found this helpful.

Really... a shot cylinder can mean sooooo many things

2 of 2 people found this helpful.
76,925

Hi Ford!

2 of 2 people found this helpful.
70,355

Yes, you're mechanic should have seen the misfire by the condition of the spark plug(s) of the effected cylinder(s). In the old days that was called "reading the plugs". A misfire can also be detected at the tailpipe. A steady exhaust stream indicates that all cylinders are firing normally. But a " putt-putt-putt" at the tailpipe is an indication that the engine is misfiring. HTH. -Jim

1 of 1 people found this helpful.

Hi back at ya FoR and Jim

2 of 2 people found this helpful.
70,355

Hi Fordnut! -Jim

Your Answer

4Runner

Looking for a Used 4Runner in your area?

CarGurus has 21,720 nationwide 4Runner listings starting at $1,750.

ZIP:

Toyota 4Runner Experts

  • #1
    Kurt Burton
    Reputation
    1,230
  • #2
    azurro
    Reputation
    700
  • #3
    kbro
    Reputation
    620
View All

Related Models For Sale

Used Toyota Tacoma
630 Great Deals out of 42,613 listings starting at $1,500
Used Toyota Highlander
418 Great Deals out of 27,636 listings starting at $1,999
Used Jeep Grand Cherokee
881 Great Deals out of 70,409 listings starting at $950
Used Toyota Tundra
428 Great Deals out of 32,056 listings starting at $1,999
Used Chevrolet Tahoe
673 Great Deals out of 39,482 listings starting at $1,000
Used Toyota RAV4
789 Great Deals out of 49,827 listings starting at $1,500
Used Toyota Land Cruiser
7 Great Deals out of 1,001 listings starting at $4,850
Used Toyota Sequoia
119 Great Deals out of 5,340 listings starting at $2,499
Used Honda Pilot
476 Great Deals out of 30,532 listings starting at $1,399
Used Ford F-150
2,291 Great Deals out of 183,829 listings starting at $699
Used Ford Explorer
832 Great Deals out of 63,644 listings starting at $1,000
Used Nissan Pathfinder
324 Great Deals out of 24,463 listings starting at $1,250
Used Toyota Camry
1,032 Great Deals out of 73,122 listings starting at $295
Used Jeep Wrangler
303 Great Deals out of 16,169 listings starting at $2,500

Used Cars For Sale

2017 Toyota 4Runner SR5 4WD For Sale
1,864 listings starting at $32,588
2016 Toyota 4Runner SR5 4WD For Sale
6 Great Deals out of 630 listings starting at $26,494
2015 Toyota 4Runner SR5 4WD For Sale
5 Great Deals out of 322 listings starting at $24,050
2014 Toyota 4Runner SR5 4WD For Sale
6 Great Deals out of 277 listings starting at $20,999
2013 Toyota 4Runner SR5 4WD For Sale
11 Great Deals out of 306 listings starting at $18,995

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.