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?

[Brian Fuerbach]

I checked the fuel press reg and all is golden. (IMG:style_emoticons/default/biggrin.gif)

I get the same low idle at the bottom of hills as you do GT350. Runs great as I get going again. I dont think it is fouling but maybe with the temporarily reduced head temps the computer is doing something to cause this. I will note my vacuum on the hill and see if it compares with yours.

Wonkipop, where in Oz do you live? I worked for a Brisbane company called EGR Automotive for a couple of years here in the US office. I currently have been employed for the last 13 years by an Aussie owned company.

[wonkipop]

I checked the fuel press reg and all is golden. (IMG:style_emoticons/default/biggrin.gif)

I get the same low idle at the bottom of hills as you do GT350. Runs great as I get going again. I dont think it is fouling but maybe with the temporarily reduced head temps the computer is doing something to cause this. I will note my vacuum on the hill and see if it compares with yours.

Wonkipop, where in Oz do you live? I worked for a Brisbane company called EGR Automotive for a couple of years here in the US office. I currently have been employed for the last 13 years by an Aussie owned company.

melbourne.

nihil44 who is on this site lives in brisbane. the weather there is nice (except in high summer when its horribly humid). i was originally born in far north queensland and my grandmother lived in brisbane where i spent teenage summers. lots of fun.
skateboarding, sailing, even some surfing if we could get out to stradbroke island.
its getting to be a big go ahead city these days. a giant urban agglomeration from brisbane to the gold coast.

good news about fuel pressure reg. (IMG:style_emoticons/default/beerchug.gif)

how long does the rich condition last on your probing spectrometer when it comes up.
is it all the way through deacceleration and on coasting all the way down hills?

[Brian Fuerbach]

I checked the fuel press reg and all is golden. (IMG:style_emoticons/default/biggrin.gif)

I get the same low idle at the bottom of hills as you do GT350. Runs great as I get going again. I dont think it is fouling but maybe with the temporarily reduced head temps the computer is doing something to cause this. I will note my vacuum on the hill and see if it compares with yours.

Wonkipop, where in Oz do you live? I worked for a Brisbane company called EGR Automotive for a couple of years here in the US office. I currently have been employed for the last 13 years by an Aussie owned company.

melbourne.

nihil44 who is on this site lives in brisbane. the weather there is nice (except in high summer when its horribly humid). i was originally born in far north queensland and my grandmother lived in brisbane where i spent teenage summers. lots of fun.
skateboarding, sailing, even some surfing if we could get out to stradbroke island.
its getting to be a big go ahead city these days. a giant urban agglomeration from brisbane to the gold coast.

good news about fuel pressure reg. (IMG:style_emoticons/default/beerchug.gif)

how long does the rich condition last on your probing spectrometer when it comes up.
is it all the way through deacceleration and on coasting all the way down hills?

I was supposed to go the the EGR factory in Oz but missed out on the trip because my wife was 8 months pregnant at the time. I left the company shortly after.

Went to check vacuum on the hills and realized I couldn't. Thought it would be as simple as using the 123 dist app as it displays vacuum. Well, the app displays port vacuum not manifold vacuum. Going to look for my vac guage and try again.

I will also note the downhill afr's and rpms to see if they change at all.

The oil cap drawing fumes is an interesting hypothesis.