Re: IML: 80s EFI timed stalling

[RandalPark@xxxxxxx]

I know that it sounds terribly simplistic, but often this kind of problem with the newer style ignition is due to  loose, dirty, or corroded electrical connections. Check for this in all electrical connections and plug/sockets, as well as each wire within each plug/socket. You may be able purchase new plug/sockets that can be spliced to the original wiring as a replacement for the original plug/sockets. 

In a modern car that I drive (which is not an Imperial) I found this to cure my stalling/delayed start issues. The culprit turned out to be the connectors for the wiring harness between the ignition module and the distributor, and also the "coil pack".

Paul

 In a message dated 10/26/2004 3:55:22 PM Eastern Daylight Time, RWestra@xxxxxxx writes:

>Rob:
>
>I experienced the "stalling after warm up" problem on my 81 a couple of years 
>ago. ?These challenging machines seem to defy methodical analysis. ?However, 
>the most recent problem (the second time) was corrected by replacing the 
>hydraulic support plate with one from another car. ?The car has run fine for nearly 
>two years now with the exception of a power loss after warm up. ?That was 
>corrected by replacing the coolant temperature sensor. ?As far as I can tell the 
>first "stalling after warm up" problem (about 4 years ago) was corrected by 
>replacing the computer. ?My experience was the same as yours. ?It would start 
>and run fine for 15 to30 minutes. ?Then would stall at a stop sign, just like 
>someone shut off the ignition. ?It would even stall while driving and simply 
>would not start again until I let it set for 30 to 45 minutes.. ?Then it would 
>start up and run like nothing had happened. ?
>
>I replaced a number of items during each incident. ?Usually one component at 
>a time. ?However, since new components are not ?usually available there are 
>times when you replace a faulty component with another faulty component. ?Unless 
>you revert back to the original set up every time the actual culprit may be 
>overlooked. ?
>
>I have replaced the Hall effect pickup coil in the distributor a couple of 
>times and never found it to correct the problem. ?However, the stalling failure 
>mode would tend to act like an open circuit in the pickup coil. ?I have also 
>replaced the oxygen sensor with no improvement. ?
>
>I am afraid I am not much help Rob. ?Mine has worked fine for the past two 
>years. ?From my experience the "stalling after warmup" has been corrected only 
>by replacing the computer or the hydraulic support plate. ?I believe the power 
>module is the item that fails in the hydraulic support plate. ?Dick Benjamin 
>has much more knowledge about the specific component failure modes. ?I just 
>replace components. ?I have disassembled and reassembled the DC motor and pump 
>inside the support plate but I doubt that is the cause of many failures.
>
>I have never replaced the shut down module, any of the relays, the ignition 
>resistor, ignition switch, ?or any of the other small components. ?I did have 
>an in-tank fuel pump fail but it just will not run when this happens. ?
>
>Good luck on the troubleshooting. ?If you have specific questions that I 
>might be able to help with please ask me. ?I have done most everything on my 81 
>but often I am not sure why. ?
>
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
> ? ? ? ? ? ? ?Rolland Westra
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
> ? ? ? ? ? ? ?Rockford, IL
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
> ? ? ? ? ? ? ?815 226 8046
>


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