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

73,985

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.
73,985

Hi Ford!

2 of 2 people found this helpful.
69,275

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.
69,275

Hi Fordnut! -Jim

Your Answer

Add photo

Related Questions

4Runner

Looking for a Used 4Runner in your area?

CarGurus has 21,033 nationwide 4Runner listings starting at $1,500.

ZIP:

Search Toyota 4Runner Questions

Toyota 4Runner Experts

#1 Kurt Burton
Kurt Burton
Reputation 1,210
#2 azurro
azurro
Reputation 690
#3 kbro
kbro
Reputation 610
View All

Related Models For Sale

Used Toyota Tacoma
557 Great Deals out of 41,663 listings starting at $2,999
Used Toyota Highlander
450 Great Deals out of 24,766 listings starting at $2,299
Used Jeep Grand Cherokee
899 Great Deals out of 70,440 listings starting at $500
Used Toyota Tundra
414 Great Deals out of 33,605 listings starting at $1,999
Used Chevrolet Tahoe
614 Great Deals out of 35,916 listings starting at $1,000
Used Toyota RAV4
867 Great Deals out of 59,750 listings starting at $1,690
Used Toyota Sequoia
119 Great Deals out of 5,343 listings starting at $2,900
Used Toyota Land Cruiser
7 Great Deals out of 1,017 listings starting at $7,495
Used Honda Pilot
403 Great Deals out of 24,734 listings starting at $995
Used Ford Explorer
809 Great Deals out of 62,465 listings starting at $495
Used Ford F-150
2,209 Great Deals out of 180,794 listings starting at $1,500
Used Nissan Pathfinder
320 Great Deals out of 23,736 listings starting at $2,500
Used Jeep Wrangler
266 Great Deals out of 15,826 listings starting at $2,997

Used Cars For Sale

2017 Toyota 4Runner SR5 4WD For Sale
2,265 listings starting at $33,995
2016 Toyota 4Runner SR5 4WD For Sale
661 listings starting at $26,245
2015 Toyota 4Runner SR5 4WD For Sale
9 Great Deals out of 271 listings starting at $23,480
2014 Toyota 4Runner SR5 4WD For Sale
4 Great Deals out of 270 listings starting at $22,900
2013 Toyota 4Runner SR5 4WD For Sale
9 Great Deals out of 295 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.