L-Jet going full Rich on Deceleration Options

[Brian Fuerbach]

1974 1.8 with L- jet. Been playing with a wide band air fuel meter and noticed that when I lift the throttle the AFR goes to max value on the gauge. I thought it was supposed to go lean. I checked the throttle position switch and it checks out fine. Going to check the wiring harness next.

What else should I check? Decel valve?

[wonkipop]

ps

i was trying to look for info on the fpr in the factory manual.

i know its a sealed unit with the 1.8s.
no adjustment nut like a d-jet.

delivers normal standard fuel pressure.
and when the off throttle business happens manifold vacuum operates it and it opens and drops the fuel pressure in conjunction with the fuel cut off business the distributor sends signal to ECU for.

and really if the fpr is screwed on the L jet you throw them away.

but if they fail, ie the membrane its going to be dumping fuel via the vac line into the plenum. and thats going to be a lot of fuel i would think.
but there could be something in that. not sure.