‘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]

I was hoping you wouldn’t tell me that was the CHT sensor lol. I traced that wire while I was warming up the engine… manifold definitely has to come off.

My thermo switch was missing the wire clip for the Bosch connector. So I robbed the one off the CSV and used safety wire for the CSV since I can reach it. I would love to know where I could buy those wire clips. My AFM is missing it’s large clip too. The safety wire works better than Ziptyes but it’s not quite snug enough.