‘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.

[Van B]

The temp switch is an interesting point. If in fact it's set for what humans would call cold weather and not what an engine would consider cold, then I may not have ever had it cold enough to truly activate the cold start. I found some document that covers some decent detail on the 912E L-Jetronic system and it mentioned exactly what you said.

Cold Start Thermo-switch:

912E = 30C/95F
914 = 15C/55F

That temp for the 914 makes zero damn sense!

I also found some wires on my dual relay that were loose. I don't understand how one side has the plastic plug and the other side looks like a hack job of different clips and pig tails?