YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > 86-95 Trucks & 4Runners
Sign in using an external account
Register Forgot Password?
Search


86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Welcome to Yotatech!
Welcome to Yotatech,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 01-26-2011, 08:01 PM   #1 (permalink)
Registered User
Personal Sales Rating: (0)
 
Sansocal's Avatar
 
Join Date: Oct 2010
Location: western wa- hopefully soon to be eastern, wa
Posts: 86
What does the distributor air gap do?

I was testing stuff just for the hell of it and came across the "air gap." I got out my feeler gauges and the biggest size I could fit in there was a .53 mm. On this page: http://personal.utulsa.edu/~nathan-b...12onvehicl.pdf , it says .2 - .4 mm AND .2 - .5 mm.

Which one is it?

Can anyone explain what this "gap" does so I can wrap my brain around it?
This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!
__________________
1989 XJ cherokee
4.0 I6
NP242
29 " all terrains
stock

Sansocal is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 01-26-2011, 08:57 PM   #2 (permalink)
Registered User
Personal Sales Rating: (0)
 
jcknthegrn's Avatar
 
Join Date: Oct 2008
Location: Tri Cities WA
Posts: 16
If there is 'no' air gap the Signal Rotor will impact the Pickup Coil and damage both the Signal Rotor and Pickup Coil. If the air gap is 'greater' than the .5mm limit the magnetic field from the signal rotor will be insufficient to be properly detected by the Pickup Coil or may not be detected at all. The results will be no spark from the ignitors or erratic spark from the ignitors.
As for the .1mm (.004") discrepancy between the two ranges given, don't worry about it. To put it in perspective, the average human hair is .1mm in diameter. To put it another way- you're splitting hairs (pun intended).
__________________
1990 4x4 DLX Pickup, 22RE, 5 Speed, stock except for the 33x13.5x15 Toyo M/Ts
1982 Longbed 2WD, bought used w/196,000 miles, sold 11 years later @ 287,000 miles still running strong.
You can have my Yota when you pry it from my cold dead hands, or I decide I want another Yota.
jcknthegrn is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 01-26-2011, 08:57 PM   #3 (permalink)
Registered User
Personal Sales Rating: (0)
 
SoCal4Running's Avatar
 
Join Date: Mar 2004
Location: Oceanside, CA.
Posts: 1,420
http://www.picoauto.com/tutorials/trigger-signals.html
This page should help explain it a little better. It looks like you have a Hall Effect style of distributor whereas the 22re's have the Permanent Magnetic Pickup style.

The air gap is simply the operational range that will produce the acceptable change in the magnetic field as the rotor (not the one in the top of the cap) spins by. Obviously too close = carnage and too loose = bad/no signal.
__________________
'86 4runner
22RE, 5-speed, LC Street EFI head w/ cam, LC Pistons, ARP Head Studs, Downey header, Dynomax 2 1/4" full exhaust, VDO water temp guage, ASIN manual hubs, 01-03 Tacoma cd\tape radio with 10" Bazzoka, Downey 2" rear springs, GDI radiator. Back to daily driving duties

'68 Ford Mustang Fastback
Daily driver with a built 289 and a streetfighter trans.(Retired)

98 Subaru Outback

2005 Toyota Tacoma
V6, 6 speed stick, Speedway Blue

Waco93.com
SoCal4Running is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 01-26-2011, 09:01 PM   #4 (permalink)
Registered User
Personal Sales Rating: (0)
 
myyota's Avatar
 
Join Date: Oct 2006
Location: GrangeVille, Idaho
Posts: 4,170
Quote:
Originally Posted by Sansocal View Post
I was testing stuff just for the hell of it and came across the "air gap." I got out my feeler gauges and the biggest size I could fit in there was a .53 mm. On this page: http://personal.utulsa.edu/~nathan-b...12onvehicl.pdf , it says .2 - .4 mm AND .2 - .5 mm.

Which one is it?

Can anyone explain what this "gap" does so I can wrap my brain around it?
The air gap there talking about is the gap between the pick up coil and the stator (i think that`s what its called,the star looking thing in the distributor) in the distributor. The last pick up coil i installed i set at 10 thousandths of an inch, they give you a range in the fsm.
__________________
86 Toyota 4Runner

Solid Axle Swap, 5'' lift, 37x12.50-15 MTR`s, Trail Gear High Steer, 5 speed manual swap, InchWorm Duel Cases, 63'' Chevy Springs In The Rear, 5'' Trail Gear Springs In Front, 27 Spline Chromoly Axles In Front, 4.88 Gears, Detroit Locker In The Rear, High Pinion Front With An ARB, Downey Header, AFM Upgrade, 95 Amp Alternator, Trail Gear Sliders, Addicted Offroad Front Bumper.
myyota is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 01-27-2011, 05:55 AM   #5 (permalink)
Registered User
Personal Sales Rating: (0)
Threadstarter [OP]
 
Sansocal's Avatar
 
Join Date: Oct 2010
Location: western wa- hopefully soon to be eastern, wa
Posts: 86
So the signal the magnets make when they are spinning go to the ignitor, then coil? This is interesting considering I also have a code 14, but no CEL.
__________________
1989 XJ cherokee
4.0 I6
NP242
29 " all terrains
stock

Sansocal is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 01-27-2011, 06:06 AM   #6 (permalink)
Registered User
Personal Sales Rating: (0)
 
xxxtreme22r's Avatar
 
Join Date: Aug 2009
Location: Wilkes-Barre, PA, USA
Posts: 13,609
correct mag pickup/hall sensor to igniter to coil back to dizzy.
__________________
3rd Annual YOTATECH Rausch Creek Run and 2012 EC4RJ Pennsylvania

Build Thread
BMW Thread

87 P/U 4X 5sp Weber Downey Hdr 2.25 Exh EB 268





xxxtreme22r is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 12-22-2013, 05:42 PM   #7 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: May 2013
Location: Magalia, CA
Posts: 20
My gap is .021 mm, does that .005mm setting apply to a 87 22re 4runner turbo? If so then I just figured out why my injectors won't spray
randu2020 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 12-23-2013, 01:27 PM   #8 (permalink)
Registered User
Personal Sales Rating: (0)
 
Join Date: Sep 2007
Location: San Francisco East Bay
Posts: 2,808
Quote:
Originally Posted by randu2020 View Post
My gap is .021 mm, does that .005mm setting apply to a 87 22re 4runner turbo? If so then I just figured out why my injectors won't spray
What?

.021mm is less than 0.001 inches (as in; thinner than aluminum foil). Are you sure you're not using an SAE feeler set, and measured .021 inches? (which would be 0.53mm, about) And what .005mm "setting" are you talking about? Are you referring to .2-.5mm ?

Yes, units count.
__________________
1994 6cyl 4wd XCab -- all stock
scope103 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 12-24-2013, 02:08 AM   #9 (permalink)
Super Moderator
Personal Sales Rating: (1)
Staff
 
Terrys87's Avatar
 
Join Date: Aug 2008
Location: Anderson Missouri
Posts: 6,626
randu2020..If you are getting fire to your plugs, there are other reasons that the injectors wont spray. I have not messed with turbo, but seems to me that it is quite similar to non turbo. I am interested in this thread as I have no fire to plugs as well. I think I have a bad wire some where that I have to start tracing out. Waiting on warmer weather.

Check your Pick up Coil inside the distributor for no fire on the plugs. Here is some info about the Pickup Coil>>> http://www.yotatech.com/f198/85-extr...l#post52121343 The Pickup Coil is a solid piece of equipment, but does fail.

You do need to get your Air Gap set correctly.
__________________
Wifes 88 4Runner Rebuild Completed-Upgrading when possible.
http://www.yotatech.com/f199/terrys8...thread-227399/

My 86 4Runner Rebuild
http://www.yotatech.com/f199/terrys8...chance-247386/

My 85 Extra Cab Build
http://www.yotatech.com/f198/85-extr...rusher-263813/

Tools,Tips, and Tricks
http://www.yotatech.com/f122/tools-tips-tricks-278208/

Last edited by Terrys87; 12-24-2013 at 03:42 AM.
Terrys87 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 12-24-2013, 02:08 AM
Yotatech
4WD Truck




Paid Advertisement
Reply

Tags
1982, 22r, 22re, air, coil, distributor, do, effect, feeler, gap, gauge, magnetic, pickup, toyota, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 12:24 PM.


2010 InternetBrands, Inc.

Search Engine Friendly URLs by vBSEO 3.5.2