Re: strange idle

[DMCVegas@xxxx]

I could be wrong on this, but I think it's the 740 that is the match 
for the DeLorean Idle Speed Motor. The 760 uses a different type of 
motor. The 740 will not be easy to get to, as the ISM is located 
under the intake manifold. Don't even bother looking at the 260 for a 
match. It uses an entirely different type of regulator to control the 
idle with isn't compatable either.

Take if from me as someone who went thru simular problems with the 
Idle Speed Circuit, don't start replacing things untill you've 
checked the wiring and all connections. Here is the quick, easy way 
to do it.

Use a voltmeter to check every thing. It should be 11-12 volts with 
the key in the "ON" postion, and the engine off. Connect the main 
feed for the Idle Speed ECU to the ground to check for proper 
voltage. Using the powerfeed, you can then connect to the wire for 
the Microswitch to verify it is fuctioning properly. To check the 
wires for the ISM, insert a jumper into the plug, and ground it to 
the engine block. The just connect the feed for the ECU to the wires 
individually to check (using a voltmeter in every instance here to 
check). By doing this, you will save yourself both headache, and 
money. I ended up spending unessisary amounts of cash on both a new 
ISM, and an ECU. Turned out the culprit was a simple wire. 1 bypass, 
and the problem was fixed!

-Robert
vin 6585



--- In dmcnews@xxxx, Delorean17@xxxx wrote:
> Hi,
> Ever since I have purchase my car it has had a small idle 
problem. 
> Sometimes it acts like the microswitch isn't engaging and will idle 
around 
> 1300 Rpm's or so