Fordmods Logo

What type of spark plugs to use on AU engine running dizzy 

 

Page 1 of 1 [ 7 posts ] 

 
 Post subject: What type of spark plugs to use on AU engine running dizzy
Posted: Thu Dec 07, 2006 9:28 pm 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 497

Joined: 5th Nov 2004

Gallery: 11 images

Ride: 1989 300ZX Twin turbo Z32

Location: Bardon, Brisbane
QLD, Australia

Hey guys. I've recently done the AU motor conversion into my EB II. I'm running EL ecu and dizzy instead of coil packs. I have replaced distributor, cap, leads, plugs and pretty much everything else. However the engine still misses between 1500-2000rpm when in load or cruising. I am running a new set of spark plugs designed the the AUIII motor (which I have). Could this possibly be the problem? I chose to use the AU III plugs coz thats what the motor was. However I'm thinking that maybe when using an older dizzy style ignition instead of coilpacks that I should be using sparkplugs designed for an EL or my EB.

Could someone who has done the conversion please let me know if perhaps I should be using EL spark plugs in my AU motor.

Plz help guys. I've spent sooo much time and money trying to fix this problem and really want it to be over.

 

_________________

Sold my EB :(
Now got my 300zx :)

Top
 Profile  
 
 
Posted: Thu Dec 07, 2006 9:40 pm 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 497

Joined: 5th Nov 2004

Gallery: 11 images

Ride: 1989 300ZX Twin turbo Z32

Location: Bardon, Brisbane
QLD, Australia

bump!

 

_________________

Sold my EB :(
Now got my 300zx :)

Top
 Profile  
 
 
Posted: Thu Dec 07, 2006 10:06 pm 
Tyre Shredder
Offline
User avatar

Age: 31

Posts: 325

Joined: 15th Apr 2006

Ride: F350, EF2 Ghia, XC & Corty

Power: 218 rwkw

Location: Wangaratta
VIC, Australia

Nope, Spark plugs to suit motor. Another plug you could try is BP6ES. Worked fine in my ED. One heatrange colder than XE spark plugs.
Have you tried replacing the coil, dissy, TFI or the cap and rotor with new parts? Have you given the motor a compression test? I had this same problem on an injected XF some time ago. Turned out to be crook injector plug that had fallen off. Could also be a dud injector, or someone may have used a CPI manifold gasket instead of the MPFI gasket. MPFI gasket has Injector cutouts... Wouldnt be the first time its happend!

 

_________________

13.28@103.73mph

Top
 Profile  
 
 
Posted: Fri Dec 08, 2006 8:07 am 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 497

Joined: 5th Nov 2004

Gallery: 11 images

Ride: 1989 300ZX Twin turbo Z32

Location: Bardon, Brisbane
QLD, Australia

Hello. Yes I have replaced dizzy, cap, rotor and leads with brand new parts. Have not replaced the coil though. What is the best way to test injectors? I've disconnected that vacuum line from the fuel reg but it turned out the same.

I will give the motor a compression test on the weekend (although a comp test was done when i bought it).

 

_________________

Sold my EB :(
Now got my 300zx :)

Top
 Profile  
 
 
Posted: Sat Dec 09, 2006 7:48 am 
Moderator
Offline

Posts: 14513

Joined: 7th Nov 2004

Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

gday

ive got the au engine in my ea i am using ngk zgr6b11 these are the plugs the el xr6 use.. i was using bosch w9rdcx but it was running a bit lean ....but i didnt have issues with running rough i have some issues with pinging......
Top
 Profile  
 
 
Posted: Sun Dec 10, 2006 10:34 am 
Tyre Shredder
Offline
User avatar

Age: 31

Posts: 325

Joined: 15th Apr 2006

Ride: F350, EF2 Ghia, XC & Corty

Power: 218 rwkw

Location: Wangaratta
VIC, Australia

If it misfires at idle, remove one injector plug at a time then replace and try the next one... you will no which cyl is playing up when the engine barely notices that the injector isnt firing.

 

_________________

13.28@103.73mph

Top
 Profile  
 
 
Posted: Sun Dec 10, 2006 5:11 pm 
Oompa Loompa
Offline

Age: 33

Posts: 43

Joined: 24th Apr 2006

Location: Rockhampton
QLD, Australia

the way we diagnose injector faults at work is to crimp the fuel return line from the injector rail. this pushes up the fuel pressure and usually if it is an injector problem the car will run smoother.

hope this helps Andrew.
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 7 posts ] 

Who is online

Users browsing this forum: No registered users and 22 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 Mon Dec 18, 2017 7:00 am All times are UTC + 11 hours

 

 

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