[73LeMans]

You may have seen my post in the Street forum on this, but just in case you didn't, here is an update the Fuel Pump Speed Controller. Calling it semi resolved is the best way to term it. Here is what was done -

I grounded the shielded wire using a shield bond connector.



I also created an EMI filter as instructed per Aeromotive Tech Bulletin #302. I soldered it inline with the MSD tach signal as instructed, yet it seemed to make no difference. I made a video so I could show ya (Fun Fact! The video was originally 15 seconds long, but the last 3 seconds were the beginning of an obscenity laden rant I thought was better left out)

FPSC video
https://youtu.be/w2nMspJQ9_8


Here the weird part. Obviously something changed, I just don't know what, but subsequent idling of the engine a few hours later produced a much cleaner signal than what the video shows. Its not 100%, but way better than what the video shows. (Full light only flashed about once every 15 seconds!!) What changed in that time frame:

--I removed the direct power and ground feeds from the battery to the controller and returned to using the ones I originally had on my new electrical board and fuse panel.

-- The shielded wire for this test recall, was run outside of the glove box, (where the MSD resides), to isolate it from the other wires. I took it back though the side of the glove box with the rest of the wires as it had been initially.

That's it. Both of these actions should have had an adverse affect on my signal, not a favorable one, so once again I'm at a loss for whats going on. Maybe it gets worse? Maybe it gets better? I don't really know. What I do know is there is a controller bypass switch wired in so it wont ever leave me stranded. (and there's the jinx)

I'm leaning toward my ancient MSD being the root cause. Either its a dirty signal because its just old, or maybe the signal isn't exactly what this FPSC was tested against or expecting. Either way, its now in the past and I'm done thinking about it. What a relief. Stupid electronics....