‘74 1.8L L-Jetronic Cold Start Low Idle, Mystery solved! Options

[Van B]

Ok fellas, here’s the run down Aux Air Regulator (AAR) and Cold Start Valve (CSV)/injector both work fine. Many of you have also been keeping up with my high idle issue that we figured out.

But yet, when the car is cold, i.e. room temp, I don’t get the high idle I should on start-up. Instead she cranks a bit and then lumbers to life. Idle lopes around 700-800rpm and then smooths out as it warms.

In all other aspects of operation, the engine seems to be pretty happy.

Thoughts? Experience? (IMG:style_emoticons/default/confused24.gif)

-Van

See post #419 on page 14 for a synopsis of the outcome.

[wonkipop]

yes @emerygt350 , that would all work to duplicate.

what i will probably do at xmas is just unbolt the aav anyway and do the hose tests etc where i can manouvre the aav. i'll be giving it a good go over again to just see if i can make any difference.

i think you can still get new ones. they put the same AAV on 924s.
i can remember researching it and i seem to recall that i managed to source them.
those aavs that went on L jets went on to be used on a lot of other cars for quite a long period afterwards.

[StarBear]

yes @emerygt350 , that would all work to duplicate.

what i will probably do at xmas is just unbolt the aav anyway and do the hose tests etc where i can manouvre the aav. i'll be giving it a good go over again to just see if i can make any difference.

i think you can still get new ones. they put the same AAV on 924s.
i can remember researching it and i seem to recall that i managed to source them.
those aavs that went on L jets went on to be used on a lot of other cars for quite a long period afterwards.

That info ( part numbers and such) would be a grand resource! New or even good used AARs not seen in 20 years!