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Hi Dale,
I spotted your post awhile back and saw you get the same good advice that I would have tried to post. I will try to help, if I can?
It looks like you have done all the things to stop excess air from getting into the engine from the places we normally look.
If you have the throttle plate as closed as much as it can be, that throttle switch is clicking to tell the computer that you and the throttle plate want it to idle, then it was left up to the IAC to do that.
Now, since you still have the problem the computer must be getting told that the engine is at some other operating temperature.
The only other perimeter not met is the ECU knowing the RPM's. I would kiss that last one off. It is running because it is getting a signal.
The engine coolant temperature sensor is the most likely candidate. It controls two things the for the engine, mixture for coldness to start and mixture for economy. Its then up to the ECU to decide things based upon that.
Pulse width for the injectors with side input from the O2 sensor, and timing!
You see if the ECU thinks its over heating it will retard the timing in order to prevent detonation. 1983 may or may not have a knock sensor but in either case the ECU has a program.
A hot engine can be seen two ways, one as just heat but it can also be a lean mixture. Without or with a knock sensor, a O2 sensor is being the "boss," it has to decide to enrich the mixture or move the timing. Emissions protocol in the program will be to fire the spark After Top Dead Center which revs the engine more but it cools the combustion chamber temperatures due to a less complete combustion. The protocol is an "idle emissions" situation.
If this is going on then it just might be the cause of your hard starting problems due to the ECS sending a low resistance signal or an erratic one for lean mixtures!
This is an 1983 and it could be old or its WIRING issues starting, I thought in 1984? '83? First year of the LH's, with the turn over from K-Jet.
HYBRIDS don't you just lov'em?
So, I like it so far!
How about you?
Hint....
You might find out what pin it goes into on the ECU. A little easier access but tricky to confirm what is doing all the time unless it's totally shot!
Also, Bye the way, if you have not found it out by now, the connectors are released by pushing down into the center of the spring wire which spreads the ends outward away from the tabs on the component. Then wiggle and tug it apart.
At least on other LH's it's done that way.
Phil
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