Extreme Terrain
4x4Wire Trail Talk Forums: Jeep, Toyota, Mitsubishi, Pajero, Isuzu, Kia, 4WD, 4x4, SUV, Off-Road and OutdoorWire Forums

Search 4x4Wire




Recent Posts
Auto Free Hub Bolts Needed
by red1987raider
41 minutes 32 seconds ago
Gen 1 rear leaf springs and shackles
by ENG1N33R
Yesterday at 11:46 PM
Need Rear Spring Leaf Shackles for Raider
by red1987raider
Yesterday at 10:04 PM
Impact's 'Accel' Keeps You Safe
by 4x4Wire
09/27/16 11:39 PM
Edelbrock's E-Force Promo Is Back
by 4x4Wire
09/27/16 05:14 PM
Running out of engine options, will this work?
by ENG1N33R
09/27/16 03:03 AM
Temp sensor on 2.6L
by rxinhed
09/27/16 01:59 AM
Support 4x4Wire
New Topics on TrailTalk
Auto Free Hub Bolts Needed
by red1987raider
Yesterday at 10:01 PM
Impact's 'Accel' Keeps You Safe
by 4x4Wire
09/27/16 11:39 PM
Edelbrock's E-Force Promo Is Back
by 4x4Wire
09/27/16 05:14 PM
Gen 1 rear leaf springs and shackles
by ENG1N33R
09/26/16 10:40 PM
JKS: Jeep JK EVAP Canister Skid Plate
by 4x4Wire
09/23/16 07:50 PM
Edelbrock's Top It Off Promotion Is Back
by 4x4Wire
09/22/16 05:13 PM
4x4 Gallery
Clearance check!
Testing the new Kenda Klever 31x10.50x15
My '88
4x4Wire YJ
IFS Holdout
More News on the 'Wire
4x4Voice
4x4Wire
MUIRNet-News
OutdoorWire
Who's Online
0 registered (), 49 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
14,488 Registered Members
38 Forums
136,565 Topics
1,077,339 Posts

Most users ever online: 309 @ 09/15/15 01:18 AM
Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#917080 - 11/22/08 10:54 PM 97 4Runner V6. Misfire cylinder 4
Adam F Offline

Forum Moderator
Registered: 01/29/01
Posts: 11595
Loc: Cincinnati, OH
Recently I've been getting a random problem in my 4Runner. It would studder and sputter for a few minutes like one of the cylinders was not firing. Never threw a code. Was very random, only happening on cold starts and happened like three times in the last 2 months.

Happened again last week. Studdering got worse, and eventually threw a code. Went to autozone, they said "misfire cylinder 4"

I cant get it to reproduce the problem, so troubleshooting is difficult.

I'm curious, how does the ECU identify a misfire in a certain cylinder? From what I understand, the truck has 3 coil packs, and each one fires 2 adjacent cylinders. How does the ECU pinpoint exactly which cylinder is misfiring?

I need to figure out if spark is getting to the plug or not, hopefully its something simple like a coil pack, wire, or spark plug. I replaced the plugs not too long ago with NGK's.
_________________________
88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride
Top
Support our sponsors
#917081 - 11/24/08 05:25 AM Re: 97 4Runner V6. Misfire cylinder 4 [Re: Adam F]
kewlynx Offline

Toyota & Classifieds Moderator
Registered: 10/06/02
Posts: 15887
Loc: Fairbanks, Alaska *****
www.autoshop101.com Article 41, Ignition#3 basically spells out how that works.

Essentially, the coil packs are set up, based on a few things; the crankshaft sensor position (cylinder position matching) and the time it takes for the coil to build up its induction charge again. I would imagine the ECU is able to sense the CS position with the firing sequence as they are paired. My apologies here; am still larnin' the new gen Yotas m'self. <img src="/forums/images/graemlins/shiner.gif" alt="" />

The FSM's over in the Taco section should be able to help you wring out the coil packs. Fixin' to go thru this myself with the 2.7.
_________________________
http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**
Top
#917082 - 11/24/08 09:44 AM Re: 97 4Runner V6. Misfire cylinder 4 [Re: kewlynx]
Adam F Offline

Forum Moderator
Registered: 01/29/01
Posts: 11595
Loc: Cincinnati, OH
Ahh OK, I understand now. Thanks!

I'll have to pull it in the garage today and have a look.
_________________________
88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride
Top
#917083 - 12/23/08 05:15 AM Re: 97 4Runner V6. Misfire cylinder 4 [Re: Adam F]
kewlynx Offline

Toyota & Classifieds Moderator
Registered: 10/06/02
Posts: 15887
Loc: Fairbanks, Alaska *****
Adam, I do believe I found my #2 misfire malfunction:

[img][image]http://i176.photobucket.com/albums/w185/Yota99714/Yota%20Mech%20Pics/Misfire2withAutoliteplug.jpg[/img][/image]

#3 wasn't much better. Whoever had the truck before me put Autolites in 'er. They were all blue, and the electrodes were pretty much like little nibs.

I've got a cheap tricks article coming out of this too. <img src="/forums/images/graemlins/wink.gif" alt="" />

BTW, gave myself an early Christmas present-- NAPA had a 40% tool discount last weekend; scored an Actron CP9175 reader. Cleared the codes; purrs away; so far so good. <img src="/forums/images/graemlins/cheers.gif" alt="" /> <img src="/forums/images/graemlins/smile.gif" alt="" />
_________________________
http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**
Top
#917084 - 12/23/08 10:09 PM Re: 97 4Runner V6. Misfire cylinder 4 [Re: kewlynx]
Adam F Offline

Forum Moderator
Registered: 01/29/01
Posts: 11595
Loc: Cincinnati, OH
Nice!

I instaled NGK plugs just a few months ago, so I don't think its my spark plugs.

Plus I pulled the # plug wire/boot and it looked fine. But I'm still planning on installilng a new set of wires to see if that fixes it.
_________________________
88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride
Top
#917085 - 12/23/08 11:40 PM Re: 97 4Runner V6. Misfire cylinder 4 [Re: Adam F]
Adam F Offline

Forum Moderator
Registered: 01/29/01
Posts: 11595
Loc: Cincinnati, OH
Nice article! <img src="/forums/images/graemlins/cheers.gif" alt="" /> I'll have to save one of my plug wires for this!
_________________________
88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride
Top
#917086 - 12/24/08 03:40 AM Re: 97 4Runner V6. Misfire cylinder 4 [Re: Adam F]
kewlynx Offline

Toyota & Classifieds Moderator
Registered: 10/06/02
Posts: 15887
Loc: Fairbanks, Alaska *****
Yeah, it worked pretty slick. Gotta thank John for sticking my photo in there after the trouble I was having earlier. <img src="/forums/images/graemlins/kewl.gif" alt="" />
_________________________
http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**
Top
#917087 - 01/06/09 03:37 AM Re: 97 4Runner V6. Misfire cylinder 4 [Re: kewlynx]
Adam F Offline

Forum Moderator
Registered: 01/29/01
Posts: 11595
Loc: Cincinnati, OH
Figured out my problem. One of the plug wires was arcing to ground right at the coil pack. I wiggled the wire a little and it quit. It was throwing a nice 2 inch blue arc! Looked and sounded just like an old school stun gun!

My NGK plug wires are supposed to be here tomorrow according to the Fedex tracker. That will fix the problem for sure.
_________________________
88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride
Top
#917088 - 01/06/09 03:38 AM Re: 97 4Runner V6. Misfire cylinder 4 [Re: Adam F]
kewlynx Offline

Toyota & Classifieds Moderator
Registered: 10/06/02
Posts: 15887
Loc: Fairbanks, Alaska *****
Where'd you get your NGK wires Adam? My OEM's were <img src="/forums/images/graemlins/zombie.gif" alt="" /> expeeeeensive. sparkplugs.com?
_________________________
http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**
Top
#917089 - 01/06/09 02:35 PM Re: 97 4Runner V6. Misfire cylinder 4 [Re: kewlynx]
Adam F Offline

Forum Moderator
Registered: 01/29/01
Posts: 11595
Loc: Cincinnati, OH
I found the NGK's from a few places. I could special order them from the local Advanced Auto Parts for $36, but I found them for $32 shipped from www.rockauto.com

The cheapest parts store brand were $52. I was kind of surprised to find NGK's cheaper than the parts store brand <img src="/forums/images/graemlins/confused.gif" alt="" />

Only downside, the wires are blue <img src="/forums/images/graemlins/barf.gif" alt="" /> I plan on putting some black cable wrap on them
_________________________
88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride
Top
Page 1 of 2 1 2 >

Moderator:  Adam F, Dandeman, kewlynx 

Search the 4x4Wire site:



4x4Wire Portal: 4x4Wire | 4x4Voice | OutdoorWire | MUIRNet-News | TrailTalk Forums | Site Index | FaceBook | Google+Google+
4x4Wire Archive: 4x4 Tech | 4x4 Reviews | 4x4 News | 4x4 Trails | Destinations | 4x4 Access
Jeep | Toyota | Mitsubishi | Isuzu
More 4x4Wire: Toyota FAQ | Toyota Projects | Toyota Maintenance | Toyota 4Runner | Toyota Tech
Jeep Tech | Jeep Projects | Jeep News | Jeep Reviews | Jeep Gallery


OutdoorWire, 4x4Wire, JeepWire, TrailTalk, MUIRNet-News, and 4x4Voice are all trademarks and publications of OutdoorWire, Inc. and MUIRNet Consulting
Copyright (c) 2000-2016 OutdoorWire, Inc and MUIRNet Consulting - All Rights Reserved, no part of this publication may be reproduced in any form without express written permission
You may link freely to this site, but no further use is allowed without the express written permission of the owner of this material.
All corporate trademarks are the property of their respective owners.