‘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]

ps @Van B

part of my conversation with mike today involved him saying he had never seen absolute first version L jet until he helped me recommission. you don't see that stuff in australia.
he reminded me its half a century old and it still goes. then swept his hand in the general direction of the door and said everything fresh on the road at the mo won't be even vaguely operational in 20 years time.

i was reminded of him pointing at the AFM housing on the air cleaner a couple of years back with a sh$t eating grin on his face saying its a 001 part #. you don't see that often, the first version of something.

i got told some more stories about his apprentiship tech classes when he was shown by an an older experience FI tech how to adjust a fuel pressure regulator that had gone weak. but it in the vice and squeeze it. he said this instructor could actually do it - fix up a screwed up non adjustable fuel pressure regulator. bush mechanic stuff.