Fordmods Logo

running rich 

 

Page 1 of 1 [ 8 posts ] 

 
 Post subject: running rich
Posted: Sun Dec 25, 2005 10:47 pm 
Oompa Loompa
Offline

Age: 37

Posts: 28

Joined: 25th Mar 2005

Location: Melbourne, 3021
VIC, Australia

i got an NU fairlane 5.0 and its drinking way too much and im not sure why it is but i'm getting 120k's on lpg and only 250k's on ultimate/optimax.
the engine has no mods and is still running the stock exaust too.
it also has a rough idle on gas.

Any ideas why it could be running so rich?
thanks!
Top
 Profile  
 
 
Posted: Mon Dec 26, 2005 12:45 am 
Getting Side Ways
Offline
User avatar

Age: 45

Posts: 1440

Joined: 7th Nov 2004

Ride: 320kw BA XR8

Location: Adelaide
SA, Australia

Seeing it seems to be running rich on both lpg and petrol, it narrows it down to general engine tune (timing, plugs, leads, air filter) and maybe oxygen sensor if your LPG system has O2 feedback. LPG can be quite hard on plugs and leads so I would start with these along with base timing and see how it goes.
Top
 Profile  
 
 
Posted: Mon Dec 26, 2005 2:51 pm 
Smokin em up
Offline
User avatar

Age: 62

Posts: 220

Joined: 11th Jan 2005

Ride: Pursuit 250

Location: Katoomba
NSW, Australia

I'd be having a good look at the air flow meter and the connections to it.
Top
 Profile  
 
 
Posted: Mon Dec 26, 2005 4:33 pm 
Getting Side Ways
Offline
User avatar

Age: 45

Posts: 1440

Joined: 7th Nov 2004

Ride: 320kw BA XR8

Location: Adelaide
SA, Australia

paulhowes wrote:
I'd be having a good look at the air flow meter and the connections to it.


That would have an effect on fuel for sure but not LPG.
Top
 Profile  
 
 
Posted: Mon Dec 26, 2005 4:43 pm 
Smokin em up
Offline
User avatar

Age: 62

Posts: 220

Joined: 11th Jan 2005

Ride: Pursuit 250

Location: Katoomba
NSW, Australia

EDXR8 wrote:
paulhowes wrote:
I'd be having a good look at the air flow meter and the connections to it.


That would have an effect on fuel for sure but not LPG.


Unless your ECU was in a confused state by the reading and was trying to compensate with other engine management issues, but if you check everything over you can at least eliminate any obscure possibility.
Top
 Profile  
 
 
Posted: Mon Dec 26, 2005 5:07 pm 
Getting Side Ways
Offline
User avatar

Age: 45

Posts: 1440

Joined: 7th Nov 2004

Ride: 320kw BA XR8

Location: Adelaide
SA, Australia

paulhowes wrote:
Unless your ECU was in a confused state by the reading and was trying to compensate with other engine management issues, but if you check everything over you can at least eliminate any obscure possibility.


Yeah its worth checking, it could be puting the EEC into limp home mode which locks timing therefore having an effect on both petrol and LPG.
Top
 Profile  
 
 
Posted: Thu Dec 29, 2005 12:52 am 
Oompa Loompa
Offline

Age: 37

Posts: 28

Joined: 25th Mar 2005

Location: Melbourne, 3021
VIC, Australia

thanks for that fellas ill get on to it.
Top
 Profile  
 
 
Posted: Thu Dec 29, 2005 2:07 pm 
Smokin em up
Offline
User avatar

Age: 62

Posts: 220

Joined: 11th Jan 2005

Ride: Pursuit 250

Location: Katoomba
NSW, Australia

Also check that there are no vacuum leaks on the manifold side of the air flow meter.
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 8 posts ] 

Who is online

Users browsing this forum: No registered users and 21 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 8:08 pm All times are UTC + 11 hours

 

 

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