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?

[emerygt350]

No, no fuel cut on the djet, but I found the rich decel startling as well. I am used to the mustang which goes to 17 or so when you are dragging down a hill. The 84 cfi system is entirely different of course. Speed density with an O2 sensor.

Just really interested in why we don't see the lean mix on our cars (so far)
I want to figure out if this is just the way it is or if something isn't right. I need to look at the manual and see if they mention anything about coming down hills. I could imagine a decent hill could completely foul a plug if that is actually what is happening. I will check that this weekend.

[wonkipop]

No, no fuel cut on the djet, but I found the rich decel startling as well. I am used to the mustang which goes to 17 or so when you are dragging down a hill. The 84 cfi system is entirely different of course. Speed density with an O2 sensor.

Just really interested in why we don't see the lean mix on our cars (so far)
I want to figure out if this is just the way it is or if something isn't right. I need to look at the manual and see if they mention anything about coming down hills. I could imagine a decent hill could completely foul a plug if that is actually what is happening. I will check that this weekend.

correct, not on yours emery.
but i think it did in 70 and maybe 71.
but i ain't argueing. L jets enough headache for me.
and if it did have fuel cut off would not have a clue how it worked. (IMG:style_emoticons/default/smile.gif)