|
04-05-2019, 10:04 AM
|
#1 |
|
Registered User
Join Date: Nov 2016
Location: Tellico Plains Tenn
Posts: 5
|
Spark plug reading
Hey, could someone read these plugs and tell me what you see? I;ve looked at all sorts of charts on the net and just don't see the same as these.
Thanks |
|
|
|
04-07-2019, 01:23 PM
|
#2 |
|
Registered User
 Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,190
|
Re: Spark plug reading
They look pretty normal.
George |
|
|
|
|
04-08-2019, 08:20 AM
|
#3 |
|
Registered User
Join Date: Nov 2016
Location: Tellico Plains Tenn
Posts: 5
|
Re: Spark plug reading
Thanks. thought so too, just couldn't find any pictures with that yellow color. Had a bad stumble upon take off, re-jet the carb to richin it up one step, runs alot better now.
|
|
|
|
|
04-11-2019, 02:26 PM
|
#4 | ||||
|
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,921
|
Re: Spark plug reading
They look blurry...
 Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
Quote:
Quote:
|
||||
|
|
|
|
04-12-2019, 03:54 PM
|
#5 |
|
Registered User
Join Date: Jun 2016
Location: Phoenix, AZ
Posts: 574
|
Re: Spark plug reading
Change brand of gas and see if yellow goes away. Mixture looks decent.
__________________
87 R30 CC Dually, TBI 454, NV4500, zero rust barn find 87 Jeep Grand Wagoneer, 6.5 turbodiesel, 700R4 |
|
|
|
|
04-12-2019, 07:20 PM
|
#6 | |
|
Senior Member
Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 1,208
|
Re: Spark plug reading
Quote:
__________________
Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
|
|
|
|
|
04-16-2019, 10:09 AM
|
#7 |
|
Senior Member
Join Date: Dec 2011
Location: Moraga, CA
Posts: 799
|
Re: Spark plug reading
Reddish rusty orange would be MMT octane booster, but that's not legal for the street. Racing only. And this isn't that color.
Not sure about the yellow. Could be sulfur, but the US has had lower sulfur regulations for years. Unless there has been an extreme weather event like a hurricane and a refinery had a burp and the regulators said sell it anyway because it's an emergency and we don't want people running out. But that would be rare. I had oil issues on an an old Honda a few years back that would make the engine misfire, but that gave white fluffy deposits. But that engine was fuel injected and the air-fuel ratio would not have been rich. It might just be an early look at a carbon deposit that is about to turn black. EDIT: Bosch says yellow comes from lead. Did anyone slip you some avgas? :-) A little light yellow is normal, they say. https://www.boschautoparts.com/docum...2-1dadd0d5def6
__________________
(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 Last edited by mattfranklin; 04-16-2019 at 10:15 AM. |
|
|
|
 |
| Bookmarks |
| Thread Tools | |
| Display Modes | |
|
|
Linear Mode
