Hello everyone!
This is my first post here because I'm at the end of my rope. Six years ago I bought a 1984 Mercury Grand Marquis LS on the cheap. Considering its high mileage of 310,000 (now 327,000) and a long list of previous owners on both sides of the Atlantic (I live in Germany), it was in pretty good shape, particularly the body. There was little surface rust and no missing parts.
There was only one problem that's been pestering me ever since: The electronic fuel injection system. The engine never ran like it should, especially at idle. It would stall whenever the car came to a complete stop and respond sluggishly to gas pedal input.
Now, six years and many, many attempts at fixing the problem later, the issue still has not been resolved. I've done pretty much everything conceivable, replaced every sensor, the fuel pump, and even the CPU, but to no avail. The basic problem remains.
The engine will always start willingly and run okay while warming up, but then idle speed drops and the engine will go out at the stoplight. It accelerates and upshifts hestitatingly just like when I got the car.
For the last few weeks, there was a glimmer of hope because the computer (I presume) upped the idle speed just a little and the engine would respond much better to the gas pedal and would not stall. Today, however, things were back to "normal".
I've thrown everything but the kitchen sink at the injection system over the last six years, yet it continues to defy me. The only thing I haven't done so far is to replace the complete wiring harness because I have to find an OEM harness at a reasonable price and in good condition first.
If that isn't feasible, maybe a more radical approach is in order, like throwing out all that electronic junk and replacing the fuel injection system with a good old-fashioned carburetor.
What do you guys think? Your ideas would be most welcome. I really like my Mercury and would simply love to finally get it running properly so I can tackle other issues like new weatherstripping for the doors or a new vinyl roof.
Thanks in advance for your input.
Regards,
Mercjerry
This is my first post here because I'm at the end of my rope. Six years ago I bought a 1984 Mercury Grand Marquis LS on the cheap. Considering its high mileage of 310,000 (now 327,000) and a long list of previous owners on both sides of the Atlantic (I live in Germany), it was in pretty good shape, particularly the body. There was little surface rust and no missing parts.
There was only one problem that's been pestering me ever since: The electronic fuel injection system. The engine never ran like it should, especially at idle. It would stall whenever the car came to a complete stop and respond sluggishly to gas pedal input.
Now, six years and many, many attempts at fixing the problem later, the issue still has not been resolved. I've done pretty much everything conceivable, replaced every sensor, the fuel pump, and even the CPU, but to no avail. The basic problem remains.
The engine will always start willingly and run okay while warming up, but then idle speed drops and the engine will go out at the stoplight. It accelerates and upshifts hestitatingly just like when I got the car.
For the last few weeks, there was a glimmer of hope because the computer (I presume) upped the idle speed just a little and the engine would respond much better to the gas pedal and would not stall. Today, however, things were back to "normal".
I've thrown everything but the kitchen sink at the injection system over the last six years, yet it continues to defy me. The only thing I haven't done so far is to replace the complete wiring harness because I have to find an OEM harness at a reasonable price and in good condition first.
If that isn't feasible, maybe a more radical approach is in order, like throwing out all that electronic junk and replacing the fuel injection system with a good old-fashioned carburetor.
What do you guys think? Your ideas would be most welcome. I really like my Mercury and would simply love to finally get it running properly so I can tackle other issues like new weatherstripping for the doors or a new vinyl roof.
Thanks in advance for your input.
Regards,
Mercjerry
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