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]

But wonkipop, that completely ignores the ecus response to the throttle being in the closed, idle position. If that is in fact one of the signals the tps sends then at idle you would expect some kind of over ride on the afm. I may be completely wrong on that, it just seems logical since a like circuit exists in the djet. Things run differently if the throttle is closed.

[wonkipop]

But wonkipop, that completely ignores the ecus response to the throttle being in the closed, idle position. If that is in fact one of the signals the tps sends then at idle you would expect some kind of over ride on the afm. I may be completely wrong on that, it just seems logical since a like circuit exists in the djet. Things run differently if the throttle is closed.

yes

thats the bit i am still thinking about. where i say so in above posts.

which one gets over-ridden. because one must? i agree with you.

i have to go back and read manuals to answer that.

but the throttle is in the closed position. and that definitely does say something to the ECU. where it is quite unlike D jet is that is the only time it says something to the ECU, except for the other time when you have your foot mashed into the firewall. and when you do that, it just says to the ECU, give me all the fuel you got. all of it.

and the flapper is being pulled open (sustantially so) by the decel route while the decel route is open. so does that dictate anything in air fuel mix? don't know.