Fordmods Logo

why is my 5th cylinder destroying spark plugs? Please help! 

 

Page 1 of 2 [ 23 posts ] Go to page 1, 2  Next

 
 Post subject: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 2:20 pm 
Tyre Shredder
Offline
User avatar

Age: 37

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

why is my 5th cylinder destroying spark plugs?
Hi all, my au1 6cyl seems to go through spark plugs on a regular basis. Ive bought new plugs bout 2 months ago and replaced 1 already. Last one -same 5th cyl- had split in half straight down centre of the inner ceramic core. This one i replaced today has hairline fracture same spot -inner ceramic core- in the same cyl, could this be, and please dont tell me it is, a sign of a pickled head gasket? Any help or opinions appreciated. Thanks Jas

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 2:51 pm 
Getting Side Ways
Offline

Posts: 6449

Joined: 11th Nov 2004

got any decent close up photos of all the plugs? Not s**t, blurry, out of focus, phone pics ect.
Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 2:58 pm 
Technical Contributor
Offline
User avatar

Age: 34

Posts: 3714

Joined: 27th Sep 2006

Gallery: 20 images

Ride: ED Falcon

Power: 133 rwkw

Location: Leeton
NSW, Australia

You running a decent quality plug? Brand wise? Sounds like a fault with the ceramic... Or some sort of detonation causing a shock to the ceramic... But again, ceramic should take that...

Cheers,
Tim

 

_________________

93 Red ED 5spd Manual Build Thread

Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
Visuals: FG XR Wheel, XR Front, 17's, BA 5 Spd Shifter, BA Ghia Window Switches, NL Cluster
Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 3:01 pm 
Tyre Shredder
Offline
User avatar

Age: 37

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

unfortunately not, plugs dont show signs of corrosion or rust but they were only put in only like 1000 ks ago probably not even

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 3:03 pm 
Tyre Shredder
Offline
User avatar

Age: 37

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

ngk plugs, were told by autopro they were good ones

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 3:37 pm 
Getting Side Ways
Offline

Posts: 791

Joined: 18th Mar 2005

Gallery: 4 images

Location: Adelaide
SA, Australia

theres no evidence of any kind of physical contact is there? is the electrode at the end damaged in any way, or even maybe a shiny spot where its been contacting anything? Any obvious noise? Agree with prev post, please post some nice clear detailed piks...

 

_________________

351 4V XB Coupe running LPG

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 3:37 pm 
Tyre Shredder
Offline
User avatar

Age: 37

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

something that was happening before the plug was my airbox on intake was split and was backfiring on lpg, end up blowin through the intake ducting also, which id just replaced then once id fixd the prob of to much air getting in she was runing like a pig. Originally thought was dodgy lead as id replaced plugs. On a whim i checkd plug . Is it just coincidence its the same cyl i found last suspect plug?
Quote:
if its got tits or tyres it will cost you

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 3:46 pm 
Tyre Shredder
Offline
User avatar

Age: 37

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

no signs of contact plug end looks really good almost put plug back in, thinking lead probs, under close inspec found hairline frac in ceramic that surrounds the conductive inner

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 3:52 pm 
Tyre Shredder
Offline
User avatar

Age: 37

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

call me paranoid but i had ef that developed head probs
Quote:
if its got tits or tyres it will cost you

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 5:53 pm 
Getting Side Ways
Offline
User avatar

Age: 36

Posts: 3737

Joined: 22nd May 2006

Ride: BF F6 Tornado - #0077

Location: Bendigo
VIC, Australia

Tipping that its a d**k injector or something similar. Either that or the coil on #5 is producing WAY too much spark

 

_________________

** For Sale ** http://www.fordmods.com/ford-parts-for-sale-f17/assorted-e-series-parts-t124697.html

F6 Tornado 2006 Build

Is it about sex? The engine in my car? Or a cure for cancer?
No?

Then f**k off

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 7:11 pm 
Getting Side Ways
Offline

Posts: 6449

Joined: 11th Nov 2004

fiftyone wrote:
Either that or the coil on #5 is producing WAY too much spark

5 and 2 are on the same coil.



Still, it's all guesses until he posts some quality close up photos.
Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Sun Jul 15, 2012 8:08 pm 
Tyre Shredder
Offline
User avatar

Age: 37

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

see what i can do ill try to get some pics for y'all

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Tue Jul 17, 2012 3:52 pm 
Getting Side Ways
Offline

Posts: 890

Joined: 1st Apr 2005

Gallery: 4 images

Ride: EF XR6 Wagon, AU2 XR6 VCT

Power: 148 rwkw

Location: Auckland
New Zealand

Damage to a single spark plug limits the possibilities. Lean detonation would be my best guess - and partially blocked injector the most likely cause. Swap two injectors around to see if the problem follows the injector.

Is the plug oily at all? Any smoke - especially "puffs" of smoke (ie, not all cylinders)? Oil leaking into the cylinder (rings, valve seal, head gasket) reduces octane and can cause detonation.

Otherwise, spark plug lead or spark plug not getting good contact with head are the only other things I can think of that are specific to a single cylinder that may be involved in the issue.

 

_________________

95 EF XR6 wagon, 17" FTRs, DBA rotors, KYB/Koni, AU bottom end, ported EF head, backcut valves, SS Inductions, Territory intake, 10.2 CR, Auckland 1258 cam, vernier gear, PH4480 headers, no cat, Tickford 2.5", 2800rpm stall, J3 chip

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Fri Aug 03, 2012 8:53 am 
Tyre Shredder
Offline
User avatar

Age: 37

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

u say valve seal? actually the car does blow a bit of blueish smoke upon start up, this is a classic sign of valve prob is it not? Also when i drive it on lpg bout every 7-10 mins it just dies, no power, no nothing , it doesnt stall persay but it just dies revs drop from 2500rpm to about 1500 and stays stable for bout 10 sec its like it goes into GHOST mode or something, then kicks back in and its alrite for another 7_10 mins. This does not occur on petrol

 

_________________

Image

Top
 Profile  
 
 
 Post subject: Re: why is my 5th cylinder destroying spark plugs? Please help!
Posted: Fri Aug 03, 2012 3:56 pm 
Getting Side Ways
Offline

Age: 32

Posts: 789

Joined: 9th Dec 2011

Ride: S1 eb 5speed

Location: Coffs Harbour
NSW, Australia

Sounds like it's leaning out on gas. Something wrong with you're computer.
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 2  [ 23 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: No registered users and 68 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Fri Mar 29, 2024 11:00 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names