Idle Speed

[DMCVegas@xxxx]

For a comple description of how the idle speed circuit is physicly 
connected, check the archives for a write up I did a little while 
back. The idle speed of the engine is regulated entirely by the idle 
speed ECU. Circuit wise, from what I've read about the main chips
on the board, I think (don't hold me to this yet, I havent yet
studied 
the board THAT close) the way that the circuit works is this: Faster 
the idle, higer the electrical input to the ECU. When ever the signal 
(idle) is too high or low, the unit increaes/decreases air flow 
accordingly to correct itself (which in turn modifies the strength of 
the signal). Idle speed (input tolerances). are preset and determind 
by the types of chips that are installed. 

I'm a little fuzzy as to what exactly your syptoms are, and which 
screw(s) you are refering to in your post. The 3 idle adjustment 
screws on the intake manifold are not used in the DeLorean 
application. On the throttle lever assembly there are 2 screws there 
that act as a stop, and a switch trip.

When diagnosing a problem with the idle speed circuit, check the 
following things in this order (remember, this is NOT a detailed 
list, only a brief one):

1. Verify the screw on the throttle assembly is making proper contact 
w/the idle speed microswitch.

2. Check that all wires in the connectors for the the idle speed
motor 
and the ECU are seated properly.

3. Verify that you are recieving the power/ground to all the proper 
wires in the circuit (a detailed, yet simple process).

Check these items and take things from there. Located in the vault is 
a copy of the wiring diagram and it's respective legend. A workshop 
manual from your friendly parts vender is ALWAYS a priceless 
investment as well.

-Robert
vin 6585



--- In dmcnews@xxxx, Les Huckins <jhuckins@xxxx> wrote:
<SNIP>
> Re idle, the postings say this might be wrong and that might be 
wrong
> and check all of it. Hasn't anyone worked out a system and 
sequence?
<SNIP>