Spark Plugs - reading them (too lean?) - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Cleveland Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 11-16-2004, 23:09   #1 (permalink)
Hanging Around
 
9psi EB's Avatar
 
Join Date: Feb 2002
Location: Perth
Age: 35
Posts: 1,209
Spark Plugs - reading them (too lean?)

I took the plugs out of my clevo today, theres some links to the pics below...
To me they seem a little bit light in colour, just wondering what others opinions are.
(one plug is slightly wet, so i've put a new set in and will get some leads in the next few days)

http://www.pentagon-its.com/pics/plugs1.jpg
http://www.pentagon-its.com/pics/plugs2.jpg
http://www.pentagon-its.com/pics/plugs3.jpg
__________________
Event's Photo Gallery: gallery.mechanicalforums.com
9psi EB is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-17-2004, 00:51   #2 (permalink)
74 XB Fairmont
 
brenx's Avatar
 
Join Date: Sep 2001
Location: Cranbourne, Vic
Posts: 5,113
Re: Spark Plugs - reading them (too lean?)

From what I can tell. Pitty the pics are blurry. It looks a tad to lean but not much. The blacken plug (pic1) is either faulty, fouled or the cylinder has issues with the rings, valve stem seals or guides.

Brenden
__________________
XB Fairmont (street car) 11.07@123.02mph.
brenx is offline   Reply With Quote
Old 11-17-2004, 01:30   #3 (permalink)
Hanging Around
 
9psi EB's Avatar
 
Join Date: Feb 2002
Location: Perth
Age: 35
Posts: 1,209
Re: Spark Plugs - reading them (too lean?)

yeah, had a feeling its a bit lean, but anyway the manifold is coming off over the next few days, it has sucked the gasket in on the no. 5 port. (that plug was white) This might also be a good excuse to put a kit through the carby, and increase the secondary jets a size or two.
The back two plugs were wet, but it is fuel not oil, i've put a new set of plugs in and will get a set of leads shortly then see how it goes from there. New plugs alone, today, made a bit of difference in responsiveness - using a 38 thou gap.
__________________
Event's Photo Gallery: gallery.mechanicalforums.com
9psi EB is offline   Reply With Quote
Old 11-17-2004, 02:06   #4 (permalink)
Registered User
 
4vxc's Avatar
 
Join Date: Jun 2004
Posts: 397
Re: Spark Plugs - reading them (too lean?)

Looks like the plugs are to hot and if anything its rich, forget the porcelain it has nothing to do with the mixture
4vxc is offline   Reply With Quote
Old 11-17-2004, 03:12   #5 (permalink)
74 XB Fairmont
 
brenx's Avatar
 
Join Date: Sep 2001
Location: Cranbourne, Vic
Posts: 5,113
Re: Spark Plugs - reading them (too lean?)

Quote:
Originally Posted by 4vxc
Looks like the plugs are to hot and if anything its rich, forget the porcelain it has nothing to do with the mixture
How do you work out white plug electrodes are rich?? Common sense tells you a white electrode is lean.

With LRP the electrodes generally red/orange due to the additives.

With unleaded it's either white (lean), creamy colored correct mixture or black (rich).

Same goes for leaded fuel but since it's not available anymore it's not an issue.

Brenden
__________________
XB Fairmont (street car) 11.07@123.02mph.
brenx is offline   Reply With Quote
Old 11-17-2004, 04:18   #6 (permalink)
Registered User
 
Racer's Avatar
 
Join Date: Oct 2002
Location: Sydney
Posts: 992
Re: Spark Plugs - reading them (too lean?)

4VXC is correct. You read mixture off the metal ring at the base of threads, not the porcelin. You view the porcelin for signs of detonation.
Racer is offline   Reply With Quote
Old 11-17-2004, 04:21   #7 (permalink)
Registered User
 
Racer's Avatar
 
Join Date: Oct 2002
Location: Sydney
Posts: 992
Re: Spark Plugs - reading them (too lean?)

ps
You can only read brand new plugs after a "clean cut". You want to be reading main jetting, not idle mixtures.....
Racer is offline   Reply With Quote
Old 11-17-2004, 05:32   #8 (permalink)
Jim Mock You Rock
 
Join Date: Jul 2004
Location: sYDNEY
Age: 46
Posts: 1,766
Re: Spark Plugs - reading them (too lean?)

Your plugs look a bit on the yellow side.My plugs are pretty white by comparison. The whiter it is the leaner the mixture.It is supposed to be a light tan colour.
useless is offline   Reply With Quote
Old 11-18-2004, 02:41   #9 (permalink)
Registered User
 
4vxc's Avatar
 
Join Date: Jun 2004
Posts: 397
Re: Spark Plugs - reading them (too lean?)

Thanks Racer, that white porcelain makes it easier to see if it has been detonating (pinging) other than that it dosent tell you much. Brenden, you should be checking your plugs when you run your car at the drags next time, the metal ring IS the only way to read mixtures as Racer said dont risk youe motor by doing it any other way
4vxc is offline   Reply With Quote
Old 11-18-2004, 04:33   #10 (permalink)
74 XB Fairmont
 
brenx's Avatar
 
Join Date: Sep 2001
Location: Cranbourne, Vic
Posts: 5,113
Re: Spark Plugs - reading them (too lean?)

I check mine via an O2 sensor on a dyno. That way I don't need to change anything @ the track. As I run exhaust on etc etc. Street legal apart from my slicks.

Brenden
__________________
XB Fairmont (street car) 11.07@123.02mph.
brenx is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Cleveland Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cold Air Intake and Spark plugs for my Ka... GedKealmen Ford Fiesta Forum | Ford kA Forum 2 11-04-2007 15:35
Reading spark plugs davis Cleveland Tech 5 07-27-2004 19:30
Recommended spark plugs for straight gas Rhett Cleveland Tech 3 06-22-2004 06:22
Red-brown spark plugs... Not enough fuel? Gil Starr Ford Probe Forum | Mazda MX6 Forum 11 12-27-2001 20:40
Reading spark plugs EA S General Tech 2 08-27-2001 22:59

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 23:25.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.