Help Need D-jet Jedi!, No full load enrichment Options

[j3vw]

Hey Folks...little help?.......73 1.7...idles pefect, ignition system and valves good.....idle air fuel mix fine...over aprox 2500 rpm....leans out bad...tested press sensor, vac.. good resistance good...all indicators are full load enrichment not happening...any ideas?...I do alot of L-jet work and ECU"s are rarely the problem..

Thanks!
Rich

[Bleyseng]

Untampered with? meaning factory unit with the epoxy seal over the WOT stop?

If all these Djet parts are stock in good condition then I'd look for a vacuum leak as the AFR should be 13.5-14 to one at 2500rpms...

Check the injector seals, manifold gaskets, throttle body seal etc as air is bleeding in to mess with your AFR..

Last thing I would do is adjust the MPS but IF everything else checks out to spec then look at that.

If its a rebuilt unit, go ahead and adjust it. I can write how if you need it.

[j3vw]

Untampered with? meaning factory unit with the epoxy seal over the WOT stop?

If all these Djet parts are stock in good condition then I'd look for a vacuum leak as the AFR should be 13.5-14 to one at 2500rpms...

Check the injector seals, manifold gaskets, throttle body seal etc as air is bleeding in to mess with your AFR..

Last thing I would do is adjust the MPS but IF everything else checks out to spec then look at that.

If its a rebuilt unit, go ahead and adjust it. I can write how if you need it.

All OG...looks untampered...no Vac leaks I can detect..(starter fluid)...the set screw on bottom of ECU is dinged so I believe thats why the idle AFR is off a tick.
Is the large set screw on base of MPS for full load enrichment?