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?

[Van B]

You guys just aren’t willing to talk about spark timing…
Riddle me this, why is timing retarded at idle conditions?

[wonkipop]

You guys just aren’t willing to talk about spark timing…
Riddle me this, why is timing retarded at idle conditions?

i agree.
double vac can distributor is an integral part of the emissions equipment.

part of a sequence.

a sequence that produces more hydrocarbons in initial combustion.
then burns them up kind of crudely on the way out the door.

have i got that right Van.
you have your head around this better than me.

[Brian Fuerbach]

You guys just aren’t willing to talk about spark timing…
Riddle me this, why is timing retarded at idle conditions?

i agree.
double vac can distributor is an integral part of the emissions equipment.

part of a sequence.

a sequence that produces more hydrocarbons in initial combustion.
then burns them up kind of crudely on the way out the door.

have i got that right Van.
you have your head around this better than me.

I understood that the retard was mostly for idle emissions. When I had mine hooked up the engine would get hotter if left idling. Never could get a consistent idle either. I have heard many say that it is required for the proper idle with L-jet but I tried and hated the tune.