[DML] Re: High Idle

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

Make sure you hooked up everything you swapped out correctly. Pay
particular attemtion to the vacuum hoses around the control pressure
regulator and the spark advance. Test the cold start valve for proper
operation when cold and cranking. Use a meter on the idle switch to be
certain it works. Check the air tube under the mixture unit where it
inserts through the "O" ring for leakage. Disconnect the frequency
valve for testing. Close down the air screws. Check the rest position
of the air sensor plate. The metering plunger could be sticking in the
mixture unit and/or the mixture adjustment could be way off. Make sure
the solenoid valve on the spark advance is working. Check the decel
valves on the throttle plates to be sure they are closed. 
These are just a few things to check. Any one or a combination can
cause a high idle. Most commonly it turns out to be a lot of little
vacuum leaks but since you changed so many things you can't assume any
particular place to start.
David Teitelbaum
vin 10757



--- In dmcnews@xxxxxxxxxxxxxxx, Woody <BePositive2000@xxxx> wrote:
> 
> I'm stumped. Car insists on running at 2400-2600 rpm. 
> 
> I've diagnosed the idle circuit by removing the ECU plugs and doing all
> the tests. I did not have the temp curve for the thermistor but the
> resistance variation approached that of a chart I had for a Volvo B28F.
> Nothing seems to be binding in the linkage, throttle plates are closed
> at idle, air metering plate not binding.
> 
> 
> 
> I tried checking the frequency valve with a dwell meter attached to the
> orange wire on the diagnostic plug, but not sure I was reading the
> dwell correctly.  One book says read dwell on 4 cylinder scale, other
> books, including the Delorean manual do not say what scale so I assume
> they mean the 6 cylinder scale. I don't have a gas analyzer and cannot
> find anyone around that will check CO who knows the engine.
> 
> This car had been in storage for 5-7 years so I removed & cleaned the
> tank, cleaned the lines, and replaced the pump, cold start injector,
> control pressure regulator, injectors and fuel distributor with those
> from my wrecked D which had most of these components replace in the
> 








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