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Wideband test video
Posted: Sat Aug 27, 2011 2:32 pm
by Alexchim
Im not sure if this is in the right section or not,
But might be useful to some,
Reason I bought this was to find out of my lucas system was running as it should
Alex
http://www.youtube.com/watch?v=ViIV3Qg65qs
Posted: Sat Aug 27, 2011 3:19 pm
by DaveEFI
I'd not worry too much about readings when revving with no load. You need to log it in some way on the road - AFR versus revs versus manifold depression, etc.
It looks rather rich at idle, though.
Posted: Sat Aug 27, 2011 4:44 pm
by Eliot
Looks rich all round. Even on overrun it only manages 14, whereas you would expect that to be 16-18
Posted: Sat Aug 27, 2011 5:46 pm
by Alexchim
Is it even worth trying to fix my lucas system?
Or just bin the lot and go after market ECU?
Thanks
Posted: Sat Aug 27, 2011 6:26 pm
by SimpleSimon
Hi Alex,cant be to much wrong with your CUX system i.e faulty AFM etc,although i am biased towards MS on the RV8
Posted: Sat Aug 27, 2011 8:31 pm
by Alexchim
Ive checked every thing, voltages on afm, tps, running mark adams decat map
Fuel return line blocked?
Knackered cam?
Posted: Sat Aug 27, 2011 8:43 pm
by Eliot
Its not that bad - unless its down in the 11's when cruising.
Posted: Sun Aug 28, 2011 9:47 am
by DaveEFI
Alexchim wrote:Ive checked every thing, voltages on afm, tps, running mark adams decat map
Fuel return line blocked?
Knackered cam?
I'm not quite clear what engine and injection you have - but the correct idle mixture on a 3.5 flapper should read about 14.1:1 AFR.
These systems don't go closed loop - so if it's well rich as it seems in your tests when revving light, it's likely to be so always.
Posted: Sun Aug 28, 2011 10:21 am
by Alexchim
Its the hotwire system
The engine is 4.6 mildly modded, kent 218 cam, heads, trumpets etc
Running a Mark Adams decatt chip
Posted: Sun Aug 28, 2011 10:38 am
by DaveEFI
Alexchim wrote:Its the hotwire system
The engine is 4.6 mildly modded, kent 218 cam, heads, trumpets etc
Running a Mark Adams decatt chip
Modding an engine requires re-mapping. Just how well this has been done, I dunno. But I'd still find out why it's so rich as shown in your clip. Get that sorted may well improve everything else. Have you checked the fuel pressure?
Posted: Sun Aug 28, 2011 11:37 am
by SimpleSimon
Alexchim wrote:Its the hotwire system
The engine is 4.6 mildly modded, kent 218 cam, heads, trumpets etc
Running a Mark Adams decatt chip
If your running the non-cat map then the CO adjuster screw on the AFM will be back in play have you checked the idle CO % as this also affects fuelling further up the throttle range to a degree weather that's causing your problem to that amount I cant say for certain
