FW: Ignition switch failure mode

[DeWitt Harrison]

On Fri, 19 Jun 2009 09:59:02 -0400,
"Geraint Lloyd" <geraintlloyd_qc at yahoo.ca> wrote:

> [ ... ]
> I have an intermittent hard start issue with the 1989 - 200 TQA - MC2
> I had a similar issue a couple of years ago and replaced many, many, many,
> many parts then and the problem went away.
> [ ... ]
> Essentially the car is hard to start if it has been left for a while,
> including overnight.
> It cranks, but either doesn't fire at all or gives an occasional hint of ignition.
>
> [ ... ]
> Some background for this time:
> No codes listed
> I have been over most of the stuff on SJM's troubleshooting list
> 
> New over the last 24 months = ecu temp sensor, fuel pump relay, CSV wiring,
> 2nd knock sensor, ISV, fuel filter, check valve, throttle pos switch, plugs,
> dizzy cap, rotor arm,  HT leads, lambda probe. Reset mixture with my bosch
> CO2 meter, 

The Hall sensor in the distributor can give these symptoms but will throw
a code. In the MC1 ECU, this code is lost if you turn off the ignition before
retrieveing it. Might be worth a second check next time you get a no-start.

DeWitt Harrison
'88 5000CS