Re: IML: '81 Imperial mystery part
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Re: IML: '81 Imperial mystery part



David:
 
I agree with the earlier comments regarding EFI Imperials.  The entire Hydraulic Support Plate is not defective.  It is probably the power module but could also be the pump (I have never seen one go bad), or the fuel metering module.  These tend to be quite reliable as well.  It is necessary to go through the diagnostic procedures to identify whether it is in the HSP at all.  There are a number of items that can go bad. 
 
I have an 81 with the factory EFI system intact and working very well.  I have had problems on two or three ocassions but have been able to repair it with used parts and a lot of persistence.  My experience is that if it is an EFI component it is probably the computer that is mounted on the left (drivers) side of the air cleaner or the power module inside the air cleaner and part of the Hydraulic Support Plate.  You need to go through the diagnostic process to first determine if it is a fuel problem (you can pour fuel in the air cleaner to determine this) or an spark problem.  Check for high voltage spark at the plugs.  There are several persons on this list who can walk you through this process better than I.  I am willing to share the knowledge I have. 
 
My advice is to learn as much as you can about the system and try to repair it.  Do not convert it to a carburetor system.  These cars with EFI work and work very well when they are right.  A good carbureted system doesn't come close to comparing to a good EFI system. 
 
My .02 worth.
 
                                                                        Rolland Westra
                                                                        Rockford, IL


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