Fordmods Logo

spark breaking down 

 

Page 1 of 1 [ 9 posts ] 

 
 Post subject: spark breaking down
Posted: Thu Nov 26, 2009 2:29 pm 
Parts Gopher
Offline
User avatar

Age: 57

Posts: 98

Joined: 23rd Mar 2009

Gallery: 5 images

Ride: 1994 EF

Location: Burnie
TAS, Australia

Hi guy's

we have a spark problem even tho complete new "ignition system"
the son's Auto xf worked 302w "complete rebuild" heads ported & block shaved honed 40k ute run's at 200F
when we put new spark plugs in its ok,but after awhile it plays up like a dog :(
we have tried diffrent plugs like Splitfire V groove No6 & NGK AP6FS both had same problem,
should we be going to hotter plugs like AP5FS :?: or any surgestions or advice & we'r still running in

devondevil
Top
 Profile  
 
 
 Post subject: Re: spark breaking down
Posted: Thu Nov 26, 2009 2:47 pm 
Smokin em up
Offline
User avatar

Age: 40

Posts: 248

Joined: 4th Nov 2007

Gallery: 1 images

Ride: AUIII

Location: COONABARABRAN
NSW, Australia

devondevil wrote:
Hi guy's

we have a spark problem even tho complete new "ignition system"
the son's Auto xf worked 302w "complete rebuild" heads ported & block shaved honed 40k ute run's at 200F
when we put new spark plugs in its ok,but after awhile it plays up like a dog :(
we have tried diffrent plugs like Splitfire V groove No6 & NGK AP6FS both had same problem,
should we be going to hotter plugs like AP5FS :?: or any surgestions or advice & we'r still running in

devondevil


So....what is actually happening to the plug? You did not say!
MITCHY

 

_________________

AUIII, PACEY 4499's, MAGNIFLOW CAT, 2.5" ZORST, 17X8" AUII XR RIMS....otherwise all factory!

Top
 Profile  
 
 
 Post subject: Re: spark breaking down
Posted: Sun Nov 29, 2009 3:19 pm 
Parts Gopher
Offline
User avatar

Age: 57

Posts: 98

Joined: 23rd Mar 2009

Gallery: 5 images

Ride: 1994 EF

Location: Burnie
TAS, Australia

Hi MITCHY
with new plugs it runs fine but after about 20km she develops like a miss- dead spot
but plugs look to be fine it has happened with all plugs that we have put in her before we put the Accel super coil direct Thundermax distributor but still doing it.
Might put new kit through Holley 650 vac & new Performer intake that's all that remains form the original set, running out of idea's quickly
Can wrong plugs damage a motor that's not even half run in has yet?

devondevil
Top
 Profile  
 
 
 Post subject: Re: spark breaking down
Posted: Sun Nov 29, 2009 8:36 pm 
Smokin em up
Offline
User avatar

Age: 40

Posts: 248

Joined: 4th Nov 2007

Gallery: 1 images

Ride: AUIII

Location: COONABARABRAN
NSW, Australia

Well i am no mechanic but if it idles ok and other than the dead spot runs ok (ie: no miss fire) got to be fuel or air. Not the plugs. My guess is take it for a drive without the fuel cap on!!!! sounds like its starving for fuel :)

MITCHY

 

_________________

AUIII, PACEY 4499's, MAGNIFLOW CAT, 2.5" ZORST, 17X8" AUII XR RIMS....otherwise all factory!

Top
 Profile  
 
 
 Post subject: Re: spark breaking down
Posted: Mon Nov 30, 2009 11:13 am 
Parts Gopher
Offline
User avatar

Age: 57

Posts: 98

Joined: 23rd Mar 2009

Gallery: 5 images

Ride: 1994 EF

Location: Burnie
TAS, Australia

Hi MITCHY
We agree with you coz we have just about eliminated every other possible cause of the problem,
Well now the box has s**t it self witch has put us behind, we was hoping to have her ready for the tassie's powercruise but wont make it now.
Thanks for your help & advice & keep on :) smiling
From
devondevil
Top
 Profile  
 
 
 Post subject: Re: spark breaking down
Posted: Tue Dec 01, 2009 10:22 am 
Getting Side Ways
Offline
User avatar

Age: 64

Posts: 3552

Joined: 7th Nov 2004

Gallery: 4 images

Power: 482 rwkw

Location: Penrith
NSW, Australia

Try closing the plug gap down to .8mm
Check you have correct plugs for the heads...
E7 have shorter plugs than GTp's etc..
Check leads at night with engine running??
Any bright leads etc ..It's breaking down...

 

_________________

As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

Top
 Profile  
 
 
 Post subject: Re: spark breaking down
Posted: Thu Dec 03, 2009 1:47 pm 
Parts Gopher
Offline
User avatar

Age: 57

Posts: 98

Joined: 23rd Mar 2009

Gallery: 5 images

Ride: 1994 EF

Location: Burnie
TAS, Australia

Thanks EBXR8380

we will do has you suggest, we are starting to think that its the Holley 650 vac we going to put new kit through it see if that helps if not we'll get new carby with intake manifold,tho my sons mate reckons he has & can modify the Holley can't make it any worse I guess.

again thanks
devondevil
Top
 Profile  
 
 
 Post subject: Re: spark breaking down
Posted: Thu Dec 03, 2009 2:02 pm 
Getting Side Ways
Offline
User avatar

Age: 49

Posts: 1634

Joined: 8th Jul 2007

Gallery: 21 images

Ride: EL F100 CAPRI XR EF

Power: 234 rwkw

Location: brighton
SA, Australia

at idle when u blip the revs is the flat spot still there?
maybe just the accellerator pump needs adjustment, the pump hangs off the front rh side of the fuel bowl and there's an adjustable screw with a spring around it. get a couple of 3/8 spanners and loosen this screw/nut off a bit and start the car any blip it again, see if that helps
Top
 Profile  
 
 
 Post subject: Re: spark breaking down
Posted: Thu Dec 03, 2009 6:45 pm 
Parts Gopher
Offline
User avatar

Age: 57

Posts: 98

Joined: 23rd Mar 2009

Gallery: 5 images

Ride: 1994 EF

Location: Burnie
TAS, Australia

Hi elf100capri
idles nice - runs well up till the flat spot & then runs well after it,but now
the son has had enough frustration,going to search for new carby he's pretty confident that will solve the issue.

thanks to everyone for their advice

thanks elf100capri
devondevil
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 9 posts ] 

Who is online

Users browsing this forum: Google Adsense [Bot] and 13 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 Dec 15, 2017 12:47 am All times are UTC + 11 hours

 

 

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