[DML] Re: Sudden acceleration syndrome?

["d_rex_2002" <rich@xxxxxxxxxxxxxxxxx>]

Chris,

I just resolved an almost exact problem with another club members
car yesterday.  FYI - the car is an early 82 model automatic that
is garage kept and very well maintained.  He described the problem
to me a few days ago, in almost the exact details you mentioned.

Idle had always been rock solid at about 750, then, out of nowhere
the idle shot up to 1800 - 2200 a few times and up to 2600 once.
There is no cruise control on this car but from what I understand,
your "resume" example is an accurate description of what happens.

This is the Idle Control Computer or Idle Control ECU.  This is
the black box computer under the parcel shelf behind the driver's
seat.  The best way to verify that this is actually the problem
is to swap it with a known good computer from another Delorean.

If you have another Delorean owner located near you, this is a
check that can be done with a Philips screwdriver in 5 minutes.
You cannot "hurt" this part by trying it in another car, but make
sure to have the key OFF before connecting or disconnecting it.

I swapped out a spare that I had from an early VIN 81 model and
that one seemed to idle low (500-600) on the 82, so I swapped out
a spare that I had from a late VIN 81 model and that one appeared
to fix the problem perfectly.  Although there may be no difference
in the VIN association with this part, there were discussions on
the DML a while back suggesting there may be two different models.

I have a feeling that this may be one of those parts that has less
than a 25 year life-span and we may be seeing more failures in the
near future.  The good news is there seems to be a decent supply
of replacement parts.  Bad news is that a new one can be 3 bills.

Good Luck and let the list know if this fixes the problem.

Later,
Rich W.


--- In dmcnews@xxxxxxxxxxxxxxx, Chris Shepherd <chrisau79@xxxx> 
wrote:
> I have a problem that has me scratching my head, soon to be 
banging against wall. My idle will suddenly increase from 780 to 
2600. Not just at idle either. The first time it happened I was 
going down the road and it seemed like I had hit "resume" on a 
cruise control (no, there isn't one and never has been). It may stay 
at the 2600 idle for several minutes, up to 60, or it may just go up 
and then down and anything in between. Hard to explain and VERY 
annoying. 
>  
> snip <




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