|
|
|
10-16-2008, 09:09 AM
|
#1 |
|
Senior Member
 
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,266
|
Broken spark plug
Anybody know what would cause the center electrode insulator to break up? I have had this problem twice now, on the number one cylinder only, and it causes a cold miss and an occasional backfire through the carb until it warms up, then is mostly smoothes out. It's an inline six. Any info/suggestions would be greatly appreciated.
__________________
70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
|
|
|
10-16-2008, 09:23 AM
|
#2 |
|
Registered User
Join Date: Apr 2006
Location: East Sooke B.C. Canada
Posts: 543
|
Re: Broken spark plug
Inline sixes have fuel distribution problems. If the cyl is running too lean, it would detonate, and melt the electrodes, and break the the porcelain. Another cause of your problem could be too much timing.
|
|
|
|
|
10-16-2008, 09:31 AM
|
#3 |
|
Senior Member
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,266
|
Re: Broken spark plug
I never hear detonation, but that is a possibility. The electrode itself does not appear to be melted, just the ceramic insulator is missing a chunk. The last time it happened was over a year ago, and I drive it every day. If it was too much timing, I would think it would happen pretty quickly?
__________________
70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
|
|
|
|
10-16-2008, 10:18 AM
|
#4 |
|
Hittin E-Z Street on Mud Tires
Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
|
Re: Broken spark plug
"Made in China"?
__________________
Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride  American Born, Country by the Grace of God  1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
|
|
|
|
10-16-2008, 11:22 AM
|
#5 | |
|
Senior Member
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,266
|
Re: Broken spark plug
Quote:
__________________
70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
|
|
|
|
|
10-16-2008, 09:30 AM
|
#6 |
|
Registered User
Join Date: Apr 2004
Location: Clanton, AL
Posts: 1,253
|
Re: Broken spark plug
I'd have to agree w/ the probable detonation. Definately not a good thing.
It doesn't fix the problem, but I have found that Bosch Platinums are much better against the insulator coming apart.
__________________
85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days!  05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal! 
|
|
|
|
 |
| Bookmarks |
|
|
Hybrid Mode
