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

Search 4x4Wire

TrailTalk | 4x4Wire | 4x4Voice | OutdoorWire | MUIRNet News | FaceBook | Google+

Shout Box

Support 4x4Wire
Recent Posts
Lifting a kia sportage? Look here first! Also tire size recommendations.
by fabsport
02/12/16 03:08 AM
87 Montero transfer case leaking from welsh plug
by KF6ZPL
02/12/16 12:11 AM
87 Montero 2.5 L SWB Dash and Running lights out
by castaway
02/11/16 07:23 PM
1987 Dodge Raider for sale
by TaylorAuto1
02/10/16 06:30 PM
89 Gen 1 Montero 3.0L Having trouble starting
by polar
02/10/16 05:25 PM
2.6l Gen 1 Front Axle Swap with Gen 1 V6 LSD - How Too - FINISHED
by plh
02/08/16 07:50 PM
94 Montero SR head-gasket project.
by myion
02/06/16 11:59 PM
New Topics on TrailTalk
87 Montero 2.5 L SWB Dash and Running lights out
by castaway
02/11/16 07:23 PM
87 Montero transfer case leaking from welsh plug
by jwthemechanic
02/10/16 05:02 PM
88-89 Starion LSD for V6 Montero
by 90rustymontero
02/06/16 02:00 PM
1987 Dodge Raider for sale
by TaylorAuto1
02/05/16 05:21 PM
95-02 Kia Sportage Mud Flaps?
by kiaformud
02/03/16 05:43 PM
4x4 Gallery
4x4Wire YJ
IFS Holdout
Pearl...The Turbo Mighty Max
Roxy the Raider, Infamous!
RXIN HED's 1980 Power Wagon, Last of the Series
New on the 'Wire
4x4Voice
4x4Wire
MUIRNet-News
OutdoorWire
Who's Online
0 registered (), 63 Guests and 59 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
14,272 Registered Members
45 Forums
136,655 Topics
1,079,591 Posts

Most users ever online: 309 @ 09/14/15 08:18 PM
Page 1 of 2 1 2 >
Topic Options
#917080 - 11/22/08 04:54 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 97 4R, stock, daily driver 98 Sienna, kid and dog hauler, wife's ride
Top
#917081 - 11/23/08 11:25 PM 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.

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 03:44 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 97 4R, stock, daily driver 98 Sienna, kid and dog hauler, wife's ride
Top
#917083 - 12/22/08 11:15 PM 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:

[image][/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.

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.
_________________________
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 04:09 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 97 4R, stock, daily driver 98 Sienna, kid and dog hauler, wife's ride
Top
#917085 - 12/23/08 05:40 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! I'll have to save one of my plug wires for this!
_________________________
88 4R, 350 V8, R150 5 speed Sold 97 4R, stock, daily driver 98 Sienna, kid and dog hauler, wife's ride
Top
#917086 - 12/23/08 09:40 PM 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.
_________________________
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 - 01/05/09 09:37 PM 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 97 4R, stock, daily driver 98 Sienna, kid and dog hauler, wife's ride
Top
#917088 - 01/05/09 09:38 PM 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 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 08:35 AM 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

Only downside, the wires are blue I plan on putting some black cable wrap on them
_________________________
88 4R, 350 V8, R150 5 speed Sold 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.com | OutdoorWire | MUIRNet News | 4x4Voice | 4x4Wire on FaceBook Google+
About 4x4Wire | Advertiser's Guide

OutdoorWire, 4x4Wire, JeepWire, TrailTalk, MUIRNet-News, and 4x4Voice are all trademarks and publications of OutdoorWire, Inc. and MUIRNet Consulting

Copyright (c) 2013-2015 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.