Wideband test video

Alexchim · Post by **Alexchim** » Sat Aug 27, 2011 2:32 pm

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

DaveEFI · Post by **DaveEFI** » Sat Aug 27, 2011 3:19 pm

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.

Eliot · Post by **Eliot** » Sat Aug 27, 2011 4:44 pm

Looks rich all round. Even on overrun it only manages 14, whereas you would expect that to be 16-18

Alexchim · Post by **Alexchim** » Sat Aug 27, 2011 5:46 pm

Is it even worth trying to fix my lucas system?

Or just bin the lot and go after market ECU?

Thanks

SimpleSimon · Post by **SimpleSimon** » Sat Aug 27, 2011 6:26 pm

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

Alexchim · Post by **Alexchim** » Sat Aug 27, 2011 8:31 pm

Ive checked every thing, voltages on afm, tps, running mark adams decat map

Fuel return line blocked?

Knackered cam?

Eliot · Post by **Eliot** » Sat Aug 27, 2011 8:43 pm

Its not that bad - unless its down in the 11's when cruising.

DaveEFI · Post by **DaveEFI** » Sun Aug 28, 2011 9:47 am

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.

Alexchim · Post by **Alexchim** » Sun Aug 28, 2011 10:21 am

Its the hotwire system

The engine is 4.6 mildly modded, kent 218 cam, heads, trumpets etc

Running a Mark Adams decatt chip

DaveEFI · Post by **DaveEFI** » Sun Aug 28, 2011 10:38 am

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?

SimpleSimon · Post by **SimpleSimon** » Sun Aug 28, 2011 11:37 am

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